This is Chinese website so please follow the instructions carefully!
Visit airdrop page and enter your ETH address in the text field. Below the text field, there's a captcha slider. Drag the arrow (left side) to the other side (it will become green) and the click the button below to register.
On the next page, you will see your verification code (something like /xxxxxxxx) and next to it there's a link to Telegram group. Copy the code and submit it in the group. Go back to the airdrop page and refresh it to see you 288 PTT tokens (could have some delay depending on the traffic).
You can also find your referral link below. You'll get 188 additional tokens for every person you refer.