The official announcement from Binance Chinese for the next Alpha airdrop requirements states that trading any token on the Alpha chain will qualify for the airdrop.

Airdrops are great, but be aware of slippage. This time, I directly jumped in with 800U and bought and sold immediately for 770U. I really can't describe this slippage; the one-minute chart kept spiking up and down. The airdrop might not have slippage, and its inherent value is high.