Currently, ASUS Mall and YouDeMai.com have launched a "trade-in service" (regardless of brand). Old phones can be recycled and exchanged for ASUS Mall vouchers and cash. The vouchers can be used to purchase goods in ASUS Mall.
The official mall login method is as follows:
On the main menu of the home page of the ASUS official website, find the "ASUS official mall" and enter "Trade-in". Enter product information on the page and there will be pricing information.