Steps to take for trading Arknights accounts securely 
 <ol>
 <li style="font-weight: 400;"> Select a trade and make a purchase </li>
 <li style="font-weight: 400;"> Make payment for your order </li>
 <li style="font-weight: 400;"> Wait until seller sends account data </li>
 <li style="font-weight: 400;"> Login to the Arknights account provided by the seller </li>
 <li style="font-weight: 400;"> Tap the gear icon at the top left of the Arknight game, then select “Account” </li>
 <li style="font-weight: 400;"> Bind the Arknights account provided by the seller with your other account </li>
 <li style="font-weight: 400;"> If your Arknights account is already bound to a Yostar account, then you must bind it to a Facebook or Twitter account, and vice versa </li>
 <li style="font-weight: 400;"> Unbind arknight account with Yoostar/Facebook/Twitter account provided by seller to secure account </li>
 <li style="font-weight: 400;"> After confirming that your account is safe, click the Done button in itemku </li>
 </ol>

How to Trade Arknights Account - Pusat bantuan itemku