The main subjects under the green family brand line fall into two main categories, namely, direct service cities and union service cities. Distinguished by the regional dimensions of urban administration. They include the cities of beijing, shanghai, tianjin and chongqing, and the cities of guangzhou, chengdu, wuhan, nanjing, hangzhou, changchun, harbin, shenyang, shi jia zhang, jenan, zhengzhou, chai fat, taiwon, sai an and changsha, as well as the cities of shenzhen, dalian and aoshima. Accompanying municipalities may serve other cities that do not have direct camps, such as non-competent municipalities and non-provincial capitals. However, it is also important to keep pace with the brand, to follow harmonized technical standards and service processes and to be subject to corporate headquarters control. (c) ensuring the quality of services and the reputation of local brands. ▪ pre-governance formaldehyde testing requires the early closure of sector-wide windows for approximately 12 hours to remove residual refurbished waste and indoor chemical supplies. ▪ 5c service closed loops, identifying overall service processes and user needs, and cloud-adapted formaldehyde programmes and informing specific content and prices. ▪ the p10 product system, which combines products such as formaldehyde, deodorant and benzene, in accordance with the adapted programme and the actual situation on the ground. ▪ the standard g32 process, which provides users with specific service content at different stages and scenarios according to the corporate service process. ▪ third party cma acceptance, seven days after governance, again closed doors and windows for 12 hours, engaging third third party cma institutions to verify the effects. ▪ user security, which has not met the standards or rebounded after three times of governance, returns the user's fees in full and without conditions。