Everyone will encounter a prompt when registering a cryptocurrency exchange.
The invitation code can only be filled in when registering. Figure 1 is the optional item that appears when registering on the APP. Figure 2 is the case when the invitation code is bound through a link or APP registration
The purpose of the invitation code is to save the expenses incurred by spot and contract transactions
Some old accounts may have forgotten whether they filled in the invitation code when registering. Now you can check whether the current account is bound
The invitation code is mainly for saving transaction fees. In fact, it is far more than the proportion shown in the picture. Check to see if you have bound it.