1. Conduct investigation and investigation on the newly joined suppliers. The newly joined suppliers provide business qualifications, download and fill in the supplier questionnaire from the website. After collecting all relevant data, the purchasing department will conduct investigation and investigation through field visits or professional websites, and send the contents and results of the investigation to the group companies to determine whether they are qualified suppliers.

2. Issue of bidding documents: according to the demand plan of each company of the group, the procurement department will issue the bidding procurement announcement on the group website.

3. Bid recovery and bid determination: suppliers submit bids within the time required by the bidding and procurement announcement. The procurement department will summarize and compare the recovered bids, and determine the quality of each supplier's production and export, supply assurance capability, etc. in combination with relevant companies and departments.