You are come from BSC chain, and want to swap BNB to HT. Here are tutorial for you.
Step 1: Click to Swap BNB to HT button
Step 2: Connect wallet to BSC chain
Step 3: Click to Swap button
Step 4: Send: Select BNB
Receive: Select HT Heco
After that click confirm to finish
Remember: The receiving address is the same with send Address.