How to check referral connection(HECO)

Go to: https://hecoinfo.com/address/0x8f80ffe983802c230f9a0950cbd654ed04fef789#readContract​

Go to "Read Contract"

Use Method "Get Invitees" Input your address, and click "Query", it will show the addresses that is invited by you.

Use Method "Get Referrals" Input your address, and click "Query", it will show the address that invited you.