Password set during registration. According to the official display of Daqing Petrochemical Health Check-up Appointment app, the password is the verification method for logging in to APP. Passwords are set for individuals to avoid being hacked by outsiders. To log in, you need to enter the mobile phone number and password set at the time of registration, and click "Log in". Daqing Petrochemical Company is a regional branch of China Oil and Gas Company Limited; With crude oil, light hydrocarbons and natural gas in Daqing Oilfield as the main raw materials, a super-large petrochemical complex engaged in refining, ethylene, plastics, rubber, chemical extension processing, liquid chemical industry, chemical fertilizer and chemical fiber production undertakes the functions of engineering and technical services, production and technical services, mechanical processing and manufacturing, and mining services.