Visit Pando rings, or search Mixin ID 7000104159 on Mixin Messenger App and click blue number. Then add bot and click little robot avatar to open Pando rings.
Click on "I Want To Supply" and choose a crypto currency（like USDT). Then click on "Connect Wallet" to start. Be sure to authorize otherwise data related to your assets won't be able to show on the interfaces.
Check all and authorize. Authorization can only view but cannot use your assets. It is safe.
The following links can quickly jump to the description of related operations.