Liu Zhijun is the founder of Laoliu Healthy Mansion and head of Shanghai Liuchuang Environmental Technology Co., Ltd. He has long worked in indoor environments and healthy-home delivery. He holds that measurable metrics should replace subjective impressions, and he carries the remediation and warranty obligations agreed in the contract.
Because treating one point at a time does not solve the problem. In indoor environmental testing and remediation, the most common case is this: the formaldehyde reading after a fit-out is over the limit, one treatment brings it back within limits, and six months later it rebounds — because the emission source is still in the walls, the cabinets, and the adhesives. Only after working with passive houses and Five-Constant systems did I understand that it has to be done at the source: materials that carry no contamination, an envelope that neither leaks air nor condenses, fresh air that keeps replacing the indoor air, and humidity that stays stable over time.
Because single-point remediation cannot solve the problem.
In indoor environmental testing and remediation, the most common case is this: the owner has a fit-out, the formaldehyde reading comes back over the limit, one treatment brings it within limits, and half a year later it rebounds. The reason is that the emission source is still in the walls, the cabinets, and the adhesives; the treatment only breaks down what has already been released.
Later, working with passive houses and Five-Constant systems, I understood that it has to be done at the source: materials that carry no contamination, an envelope that neither leaks air nor condenses, fresh air that keeps replacing the indoor air, and humidity that stays stable over time. Only when all four hold at once is the indoor environment "reliably good" rather than "good on the day of the test".
Design and construction sit within one entity, which is the biggest difference from a subcontracting model. Four stages: design and planning (needs diagnosis, target metrics, coordinated drawings), MEP and HVAC (equipment selection and hydraulic calculation), construction management (sequencing and concealed-work inspection), and commissioning and service (commissioning, CMA re-testing coordination, warranty response).
Design and construction sit within the same entity. That is the biggest difference between us and a subcontracting model.
One entity owns all four stages, so when something goes wrong you are not sent back and forth between parties. That is also why theseven-stage processworks end to end.
We take on: villas and large flats of 300㎡ and above in Jiangsu, Zhejiang, and Shanghai, where the owner is willing to invest time at the design and concealed-works stages and accepts that the metrics can be measured. We turn down: projects that want a price without a site survey, projects that demand metrics we cannot promise, projects whose budget and targets are badly mismatched, and projects that ask us to borrow a qualification or to issue a report that is not true.
This section says more about who we are than the ones before it.
We take on: villas and large flats of 300㎡ and above in Jiangsu, Zhejiang, and Shanghai, where the owner is willing to invest time at the design and concealed-works stages and accepts the premise that the metrics can be measured.
We turn down：
Shanghai, Jiangsu, and Zhejiang. The limited area protects our attendance frequency during construction and our service response after handover. Much of the value of a health-related system lies after handover — commissioning, maintenance, filter replacement, and recalibration all require being on site. Spread the area too wide and response times inevitably fall.
Shanghai, Jiangsu, and Zhejiang. Our office is at 2F09, Ouya Plaza, 395 Yishan Road, Xuhui District, Shanghai, and you can book a meeting there or a site survey.
Limiting the area to Jiangsu, Zhejiang, and Shanghai protects our attendance frequency during construction and our service response after handover. Much of the value of a health-related system lies after handover — commissioning, maintenance, filter replacement, and recalibration all require being on site.
The operating entity is Shanghai Liuchuang Environmental Technology Co., Ltd., and the site registration number is 沪ICP备2026059953号. Stages that involve testing are carried out by a third-party body holding CMA (China Metrology Accreditation) accreditation; reports are never issued by us — a firm testing its own work produces a report with no meaning.
The operating entity is Shanghai Liuchuang Environmental Technology Co., Ltd., and the site registration number is 沪ICP备2026059953号.
Stages that involve testing are carried out by a third-party body holding CMA accreditation, not reported by us. This is a boundary we keep deliberately: a firm testing its own work produces a report with no meaning.
With the owner's consent, visits to projects under construction can be arranged. Such visits need to be agreed in advance and must respect the privacy of the owners whose homes are in progress.
We design and build the health systems and the MEP scope, and coordinate with the fit-out contractor the owner appoints. Drawings are coordinated at the drawing stage to avoid interface conflicts. We can also deliver the project as a whole, including semi-package construction work.
Yes, but the fit-out contractor must build to our drawings and sequencing requirements. Interface coordination remains our responsibility, which is why we insist on coordinated drawings.
We do not publish a project list at this time. In person we can walk through how delivered projects were built and what the re-testing showed, always respecting client privacy. Authorized project reports will be published here as they become available.
To find out whether your house is a fit and how a scheme would work, call us or add us on WeChat. We answer one to one.