It seems that I can only exchange USDC for others when I click in.

[One picture flow] Binance wallet exchange new event is here, reward 100BR worth 10u. First come first served, register now to reserve a spot, redeem after the event starts, need to verify face.

[Event Rewards]
First come first served, 100,000 people each 100BR

[Event Time]
March 30 00:00~March 31 00:00

[Event Participation]
1. Register now to reserve a spot, need to scan face, after the event time starts (March 30 00:00), click the swap button, use the exchange funds to exchange the cumulative transaction volume of more than 50u, use USDT and USDC to exchange the most cost-effective, see one picture flow.
2. The registration quota is used up, or the event period ends and is closed.

There is no response when you click to register, try to use the firewall.
The button changes to [joined] (translated into [Participate] in Chinese), which means that the registration is successful:
[Register]——[join now]----Not registered
[Participate]——[joined]----Registered

Attached #一图流 The most cost-saving plan, pay attention to the start of the event:

[What to do if you don’t have enough 50u? ]
If you don’t have 50u at one time, and the exchange is not enough for 50u, you can return to the exchange after exchanging usdc, and then exchange usdc for usdt to increase the volume. It is best to collect more than 50u in one go to save gas and trouble.

[How to use the USDT of the exchange]
The default is usdc, and usdt is also OK. Turn off [Use exchange balance], select usdt, and then turn on [Use exchange balance] to refresh USDT.