Which school is better for cleaning?

Which school is better for cleaning as follows:

Beijing environmental sanitation engineering group co., ltd.

Beijing Environmental Sanitation was established in 1949. It is a comprehensive environmental service provider in China, and is a large state-owned enterprise dedicated to comprehensive urban and rural environmental services, waste resource utilization, solid waste equipment manufacturing, environmental sanitation technology research and development, environmental sanitation engineering construction and other fields. The 15 national and local environmental sanitation operation standards have been formulated, which has created a service model of "big sanitation, full coverage and integration" suitable for China's national conditions and formed a service model that meets the requirements of the first good.

Diqi environmental service group co., ltd

Tiqi Chengfu, a wholly-owned subsidiary of the listed company Tiqi Environment (stock code: 000826), is an innovative comprehensive urban environmental service provider integrating sanitation operation, domestic waste classification, smart public toilet construction and operation, community service, landscaping and property management. Tiqi urban service projects are distributed in 27 provinces and cities, with more than 500 operational projects, and the accumulated cleaning area is 654.38+0 billion square meters.

Beikong city environmental protection resources investment co., ltd

Beijing Urban Resources Group is a comprehensive waste management solution provider in China, which was listed on the Hong Kong Stock Exchange in 2020 (stock code: 037 18). Mainly engaged in providing environmental sanitation services and hazardous waste treatment services, including road cleaning, garbage collection and transportation, garbage transfer station management, public toilet management and other services. Its business layout is in 24 provinces, municipalities and autonomous regions, with more than 6,544 businesses.

Aimake service industry co., ltd

Amartya was founded in Philadelphia, USA, 1936, and listed on the new york Stock Exchange. It is a global professional enterprise in the field of catering, facilities and uniform outsourcing services, focusing on providing facilities management services and catering services for various institutions and enterprises. AMark's global annual turnover exceeds10 billion USD, serving millions of people in 19 countries and regions around the world.

Beijing ayton hotel service co., ltd.

Eaton Group, which originated in Asia, is an internationally renowned provider of integrated facilities management solutions, and is committed to providing integrated facilities management services such as energy management, renewable energy, catering services, large-scale nutritious catering, high-end catering, space environment design, asset management, security, cleaning and handling equipment leasing. Its business covers more than 80 cities in China and 25 countries in Southeast Asia, Central Asia and Africa.