With the improvement of the social and economic level, consumers have increasingly higher requirements for food, clothing, housing and transportation. Taking food companies as an example, in order to meet market competitiveness, they must fully cater to consumers' escalating demands for taste, nutrition, and health. The development of different flavors, so that consumers can continue to repurchase products without health concerns on the basis of satisfying the taste, has become a product research topic for contemporary food companies. This also forces modern food companies to set up laboratories that meet cleanliness requirements and introduce GMP management systems when preparing food bases. In other words, it is not an exaggeration to say that the clean room has become a rigid demand for all production enterprises.

With the emergence of various functional laboratories and meeting CNAS accreditation and CMA qualification accreditation, companies will inevitably need to spend a lot of energy in the process of screening contractors. Nowadays, many service providers who do clean engineering are mostly transformed from laboratory furniture or equipment vendors. They are only good at certain aspects of laboratory and clean room engineering. Other aspects are still coordinated by subcontracting. Objectively speaking, companies that specialize in general contracting of clean engineering (EPC) will be suitable for clean/purification projects.

A complete purification project consists of clean room planning and design, clean room engineering decoration, air purification engineering, HVAC engineering, clean electrical and mechanical installation engineering, fire protection engineering, process pipeline arrangement and other unit businesses. It is a huge system engineering. According to the relevant standards of the HVAC and Purification Industry Association, the evaluation of the ability of professional contracting companies for purification projects is divided into three levels, one, two and three, which is an assessment of the creditworthiness, construction and technical level, and engineering of companies engaged in clean room air purification projects. Performance, business premises, after-sales service, credit level and other indicators are fully evaluated for qualification and ability confirmation. The relevant standards are detailed in the article "Quality Evaluation Standards for Purification Engineering Contractors" of CEIDI Xidi. The project demander can use this as a basis to investigate and judge whether the contractor is a qualified contractor. The bidding process of large national government agencies and Fortune 500 companies is also based on this.

Shanghai Xidi Industrial Co., Ltd. (CEIDI Xidi), is headquartered on the 3rd floor of Building C, Wantong Center, Hongqiao Business District, Shanghai. The company has a registered capital of 50 million. Inventor of Level 3 Qualification, Level 3 Qualification for Mechanical and Electrical Installation, Level 1 Qualification for Purification, Level 3 Qualification for Environmental Protection and Steel Structure, and two patents for clean room construction materials, focusing on providing planning for laboratories, clean rooms, animal rooms, and operating rooms. Design, decoration, furniture and supporting engineering integration professional integrated services. As of 2020, CEIDI has built benchmark projects for more than a thousand companies in the clean fields such as laboratories, clean rooms, and animal rooms, with a cumulative construction area of more than 2 million square meters. As an EPC service provider with strong qualifications and rich experience, it can provide integrated solutions and service support content such as clean project planning and design, engineering construction, supporting system installation, laboratory furniture matching, qualification certification, etc., to help users achieve long-term benefits.