Is the installation of Guo Liang GM reliable?

Very reliable. Guo Liang Global Installation has a legal business license and passed the certification of the industrial and commercial department. Guo Liang Universal Installation Service Company is a comprehensive information service platform integrating installation, maintenance, after-sales, household appliances cleaning, housekeeping cleaning, online shopping product installation, offline store installation, air detection, formaldehyde control, sewer dredging, water, electricity and heating installation and maintenance.