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一 | 五一假期即将到来，为了能让消费者敢消费、愿消费、乐享品质消费，中国消费者协会今天（25日）发布消费提示，提醒广大消费者注意以下几点：　　交通住宿需规划　　五一期间人流、车流量大，景点、道路可能出现拥堵的情况，消费者如果选择外出游玩，应提前规划好行程，合理安排出行路线、方式和住宿酒店等，注意景点门票预售、预约信息，密切关注旅游目的地气象、交通、卫健、应急等部门发布的提示信息。 By Anna Dalla Valle (CNS)-- Forward-looking mindset: whole-system and life cycle thinking My work is centred on the environmental sustainability of buildings over the entire life cycle and beyond in view of the circular economy: from design and construction to use and reuse, up to final disposal or, preferably, recovery for a second life. Here, the paradigm shift is twofold, because a whole-system thinking is needed not only to consider the entire life cycle, but also to envision what happens next. The ultimate goal is to minimize environmental impacts and to drive both sustainability and innovation. To be more explicit, the first shift involves keeping in mind the entire life cycle – from the early design stages – moving beyond the traditional focus on construction and energy efficiency during use. It is to select building products looking back to the supply chain, such as recycled content, locally sourced and bio-based solutions, while also looking ahead to performance decay, maintenance needs and the potential for extending service life. Moreover, the second shift press to move beyond the linear building process – as traditionally practiced – in which we extract raw materials, we build, we use, and eventually we demolish. Indeed, this model has reached its limits, undermining planetary resources with adverse environmental and social effects. Interconnected choices: designing decisions that create shared value A life cycle perspective matched with circularity inevitably challenges this linearity, wondering from the very beginning about what happens when assets become obsolete and fall into disuse, to design buildings as part of a continuous loop of resources. Accordingly, design, construction, daily use (energy and water consumption), maintenance, replacement and end-of-life turn out to be regarded not as isolated steps but interconnected with each other. In fact, at each stage, choices can either preserve or destroy value. For example, if construction solutions are carefully selected, they can be reused in the future, either in their entirety, as whole products, or through disassembly into components, or even by separating materials. In this way, they may maintain the same function (e.g. a window reused as it is) or serve different purposes (e.g. glass cullet used as input for glass wool insulation). If technological systems are designed flexibly, buildings can reach different business segments and host concurrently different activities, resulting easily adaptable from housing to office and vice versa, instead of being demolished. If building processes integrate digital tools, data can guide smarter decisions over decades, provided that data infrastructure is ensured, followed by constant monitoring and analysis of the collected data and the update and dissemination of results across industry and practitioners as well as policymakers. Thinking this way means making choices future-oriented, ready to embrace innovation while respecting planetary boundaries, namely limiting the environmental impact at every stage and in every region – to avoid burden shifting – not just at the beginning but along the whole (first-second) life cycle. Certainly, a demanding but exciting challenge: one I am proud to take on and in my little to contribute to. Beyond appearances: close-up process for understanding what lies behind In daily life, we often say to "look beyond appearances". Usually, this expression pertains to people, to underline the risk of avoiding judging someone solely by what can be seen. Now the interesting thing is that the same advice can be applied to architecture, obviously without undermining the importance of aesthetic beauty, at the core also of the New European Bauhaus initiative together with sustainability and inclusion. Nonetheless, as an architect expert in sustainable technology, I have learned to extend it to the built environment, by seeing buildings not merely as visible structures (walls, roofs, windows), but as living parts of a larger and complex system. In this sense, architecture can be compared to a plant. Plants are anchored in the soil by roots; buildings are anchored in the ground by foundations. Plants capture sunlight, absorb water, accommodate small animals, and interact with other organisms; buildings consume energy, deplete water, host human life, and interact with their surroundings. Both are deeply connected to their ecosystem. However, to fully understand them, both must be looked beyond appearances, through a "close-up" process taken to the extreme. It is not simply a matter of focusing on details, as happens in photography and cinema fields; the intention is to delve deeper and deeper to the fuller extent: an in-depth analysis of whatever is behind, starting from the exterior to gradually shift to construction technologies, materials, up to their chemicals. The latter is, of course, not the responsibility of architects, but it lies at the heart of Life Cycle Assessment (LCA), analyses that I usually perform during the decision-making at the different process stage to help building stakeholders minimize environmental impacts across the entire – potentially multiple – life cycle. For architectural technology, for example, it is a matter of addressing, alongside conventional requirements (e.g. performance, safety, usability, well-being), the specific requirements of environmental sustainability (e.g. the rational use and optimization of materials, energy, water), taking into account the technical feasibility and evaluating the entire life cycle. At the utmost, it is to look into everything that underlies the presence of that specific material in that exact spot, its behaviour and interrelationships when in service, and its post-use journey, setting up the necessary network to actually close the loop in practice. Material-immaterial synergy: the invisible foundations of sustainable architecture To embrace this vision, the idea of resources is to be extended compared to the ordinary sense. Certainly, buildings are made and calls for a set of tangible resources, such as money to be started, bricks, steel, or timber to be erected, tools and equipment to be managed including in the long-term. The issue that often runs out is that buildings rely heavily as well on intangible resources, namely knowledge, skills, processes, organisation, information flows and network. These two dimensions – tangible and intangible – are closely connected and interdependent on each other. Without appropriate eco-design knowledge, even the best materials are wasted; without materials, knowledge has no application. In such a mindset, architecture becomes a remarkable expression of the synergy between tangible resources and intangible resources: a space where East and West can successfully meet, building a bridge across cultures through openness and inclusiveness. Indeed, it is well recognized that different traditions bring different perspectives and, when combined, generate the best and more holistic solutions. The "living building" is both a technical and cultural artefact, an expression of human creativity that must not overstep the planetary boundary. Strategic imperative: cross-border and cross-disciplinary cooperation Evidence is found in international collaborations such as Joint Schools, where universities from different countries join forces to promote shared research and training. A concrete example of Sino-foreign cooperation is the XJTU-POLIMI Joint School, opened in Xi'an (China) in 2019 through a partnership between Politecnico di Milano and Xi'an Jiaotong University. As POLIMI's first campus outside Italy, it serves as an international platform dedicated to education and research as well as technology transfer and business incubation. This initiative, like others currently in place, aims to take the best of each part to foster shared growth and mutual learning. Italy brings its strong polytechnic culture, its multidisciplinary approach and focus on design quality, together with the European emphasis on social and environmental responsibility. China, in turn, is a leader in fast-evolving business, in the integration capacity of digital technologies and in large-scale engineering projects, pulled by top-down policies that allow fast implementation. In conjunction, these strengths can create fertile ground for innovation and speed up the transformation process within the Architectural, Engineering and Construction (AEC) sector, always been acknowledged as resistant to change, due to its intrinsic complexity and fragmented nature. Rethinking the built environment: buildings as resource-driven assets The effort is to move beyond the concept of buildings as "material banks" – namely repositories where resources are temporarily stored – to rethink them and push the vision further of buildings as "resource-driven assets". While the first construct is earmarked for physical goods, that proposed calls for careful consideration of both tangible/material/visible resources and intangible/immaterial/invisible resources, taking care that everything is optimised and nothing is wasted, to preserve their value over time. In practice, this means looking at what goes into buildings, such as materials, systems and the energy required to transform and assemble them, but also, for instance, the set of expertise, skills and specialization of practitioners involved during design. Similarly, starting from the outset, it means looking at what comes out throughout buildings life, like emissions, waste, and decommissioned materials, but also knowledge gained from monitoring and lessons learned from operations. To ignore either side of the equation (inputs-outputs) would be a missed opportunity. If we want buildings to truly act as resource-driven assets, we must synergise, map, understand, and manage the full spectrum of in- and out- flows, both tangible and intangible. On the tangible side, this requires a deep understanding of material, energy and water flows across the entire life cycle. Which resources are extracted, transported, and assembled? How much energy is consumed, and how is it sourced? How do materials degrade over time, and how can they be reused or recycled without losing quality? These questions are essential to reduce impacts and to design systems that are both efficient and resilient. On the intangible side, equally important are the flows of information and knowledge that connect all actors in the construction value chain. Long before a building is erected, crucial questions are: How is data exchanged among stakeholders? Is communication efficient enough to speed up the workflows? How can design capabilities evolve into maturity, meaning quality achieved through best practice? Then, as more buildings themselves add to this immaterial layer through sensors, smart meters, and digital platforms that produce valuable insights, another set of questions follows: How is this information managed, shared, and preserved? How to ensure that data supports predictive maintenance and reverse logistics? How to activate new business models based on sharing and collaboration? Just as materials should not be wasted, neither should information. Data and knowledge must be treated as resources that enrich our collective know-how, building an "infodump bank" that not only improves current performance but also informs future decisions, guides new designs and strengthens subsequent projects. The correlation between tangible and intangible resources is ever closer: managing them together ensures that nothing is wasted and that the embedded value is preserved across time. In that respect, "no waste of resources" also means "no waste of value", since every material, every bit of data, and every piece of knowledge carries potential that, if carefully handled, can extend usefulness, inspire innovation, and create lasting benefits well beyond the life of a single project. Global impact: construction sector as global lever for planetary sustainability Through joint research and cross-border exchange programmes, the construction sector proves to be an extraordinary testing ground and given its global impact in terms of emissions and resource consumption, it clearly stands as a priority for change. Furthermore, never forget that buildings are everywhere and shape our daily lives, leading mindful planning crucial not only for preserving the natural environment but also human well-being. In this framework, architects, engineers, designers, scientists and all necessary professionals can work side by side to explore new possibilities, even creating new synergies across key business sectors. Imagine if constructions integrate materials from unexpected sources such as fashion and/or food waste. Fast-fashion clothing and textile scraps, invasive plants and agricultural by-products, or even organic waste – which are currently a significant environmental burden with serious social effects – can be rethought as valuable inputs for new building solutions. In this way, the concept of waste disappears, as it serves as input resources from another industrial sector, consequently, contributing to lower material intensity (virgin material reduction), greater industrial symbiosis (new business opportunities), and implementing smarter ways to manage resources. At the same time, digital technologies and artificial intelligence can support this process, helping to track resources, optimise flows, and potentially update in real-time the expected environmental impacts in relation to what actually happens. The ambition is to create architecture that is resource efficient and socially valuable in the long term. Considering the key role of construction, even small changes, when scale up to thousands of buildings and millions of people, can make a big difference for the planet. At this point, the key role of China is beyond question. As the world's largest construction market and major exporter, its choices strongly affect global trends, making environmental awareness and transparency in its building sector essential. Indeed, in a globalised economy, what is produced in one region may be assembled in another, used in a third and so on throughout the different stages of the life cycle, spreading responsibilities across several borders. For this reason, it is imperative to turn LCA into a standard practice, but also to regionalise results, to identify where the greatest impacts occur over the building life cycle, including in geographical terms. Here, China inevitably results in a central hotspot to concentrate efforts: improving practices there could deliver benefits worldwide, setting the chance to become an outstanding reference and reducing burdens far beyond its borders, (hopefully) without exceeding the limits of the planet. Yet – be warned – the focus is not solely on new construction, where starting from scratch makes everything easier: the real challenge (and greatest opportunity) stands in the existing building stock, because of representing the largest reserve of resources we already have. These artefacts embody vast amounts of materials, energy, and human effort that should not be wasted leaving unfinished and/or uninhabited. Instead of discarding them, we must be proactive to renew the existing buildings, extending their service life while improving performance to meet ever-evolving needs. Call to action: building bridges within planetary boundaries It is time to join forces, to move from theory to practice, from words to action. To succeed, we need lots more than technology. We need dialogue between cultures; we need young and open minds, trained to think across disciplines and borders, ready to learn from diversity, capable of working together toward a unified vision, think globally while acting locally. Green architecture should not be perceived as a trend, but as a common responsibility of the present for the future. These are just the premises to the most open question ever: "What if we built bridges between East and West, without crossing the limits of our planet?" I therefore invite everyone to begin offering practical responses, reframing global challenges as shared opportunities for innovation. Profile: Anna Dalla Valle is an Assistant Professor and Researcher in the Department of Architecture, Built Environment and Construction Engineering (DABC) at Politecnico di Milano, Italy. She is an associate and active member of both the Italian LCA Network Association and the Italian Society of Architectural Technology. She represents Politecnico di Milano in the New European Bauhaus initiative and fully participates in various international organizations, including the LCA Working Group of the Italian Green Building Council, the Italian Circular Economy Stakeholder Platform, and the International Energy Agency’s working group on ' Ways to Implement Net-zero Whole Life Carbon Buildings'. 。　　选择自驾游、长途巴士的消费者应时刻关注路况，尽量错峰出行；选择飞机、高铁出行的消费者要提前购买往返票，并通过正规平台、网站购票，如遇到有打折的车票或机票务必思考折扣是否合理，不要轻信“特价机票”“内部渠道”等宣传，防止上当受骗。

二 | 　　选定酒店时要通过正规平台多方比价，并仔细查看酒店的评分和其他消费者的评价，注意酒店周围的交通和环境。　　选择旅行社前要通过全国旅游监管服务平台查询旅行社的资质和注册信息，确保旅行社资质齐全、经营范围明确，并签订正规旅行合同，仔细审阅合同内容。　　购物充值要警惕　　五一期间不少商家会开展各种促销活动来吸引消费者，其中难免鱼龙混杂，消费者要审慎选择、理性消费，避免落入各种消费陷阱。　　在购买商品前，消费者应当先评估自身的消费能力，然后货比三家择优选购，面对商家的促销和宣传不要冲动，多关注商品的品质；同时秉持绿色消费的理念，主动选择包装简约、质量过硬的商品，抵制过度包装的商品。　　对于需要购卡充值的预付消费，消费者务必仔细审阅合同条款，明确退费、违约等事项，避免一次性充值过大金额。　　另外不要听信自称中消协帮忙办理退款、退费的电话、短信和平台传闻，中消协已在声明中多次强调此系不法分子冒充，而且正规退费流程一般会以原路返还的形式返还本人缴费账号，凡是退款时要求额外支付费用的，都是诈骗！　　饮食就餐讲卫生　　消费者外出就餐时要注意“舌尖上”的安全，树立文明健康的饮食观念，提高自我保护意识。　　消费者尽量选择经营资质齐全、就餐环境干净卫生、食品量化等级高的餐厅就餐，并关注菜品是否新鲜，不要食用“野味”和未加工处理的“生鲜”食品。　　购买食品时要选择包装及标签信息完整的食品，并按照说明保存和食用。　　另外，勤俭节约是中华民族优秀的传统美德，消费者要树立正确的食品消费观，把“光盘行动”作为一种时尚，从自身做起，持续做制止餐饮浪费的“先行者”。节日与亲朋好友聚餐，不攀比、不炫耀，按需用餐，剩余饭菜打包带走，拒绝铺张浪费。

三 | 　　消费纠纷留证据　　购物凭证是消费者与商家发生消费纠纷后，依法维权的重要证明。广大消费者在购买、使用商品或旅游消费中，一定要注意索取并妥善保留购物发票、收据、支付记录等消费凭证，当自身合法权益受到损害时，应当本着合法、正当、公平原则，首先与商家协商解决，如果和解不成，可向有关部门投诉，也可通过全国消协智慧315平台向消协组织投诉。　　（总台央视记者王婧）。