Guangzhou Yijie Cleaning Technology Co., Ltd. Address: Shibei Industrial Park, Panyu District, Guangzhou
B: Guangzhou Huaao Cleaning Service Co., Ltd. Address: No.110, Navy Building, Donglang Street, Fangcun.
C: Guangzhou Cleaning Company Address: D, No.18 Tiyu West Road, Tianhe District, Guangzhou
: Guangzhou Exterior Wall Cleaning Company Address: No.367 Guangzhou Avenue Central, Guangdong
The above companies are all professional companies, you can refer to them.