All right. The salary of pre-sales engineer is 9- 14k 13, including: paying five insurances and one gold in full, enjoying annual leave, labor protection, regular physical examination, union holidays and birthday condolences. Convenient business areas are tap water production and supply; Design, installation and maintenance of water supply and drainage pipe network, water heating installation, processing and installation of metal components, construction and maintenance of municipal facilities; Building materials (excluding dangerous chemicals), water supply and drainage materials, plumbing equipment, Wujinjiaodian, daily necessities and non-staple food retail; Housing rental, tourist reception, accommodation, catering, swimming and water entertainment services.