What do you mean Pinduoduo was finally possessed by koi fish?

"Pinduoduo was finally possessed by koi fish" is a visual statement, which is used to describe the situation of actively participating in activities and sharing good luck on Pinduoduo platform.

Users have accumulated certain activity benefits or coupons through group battles, bargaining, signing in, etc. Finally, I enjoyed greater discounts and rewards in the shopping process. "koi fish" is a mascot in traditional culture, symbolizing auspiciousness and happiness. When users get a lot of benefits and rewards on the Pinduoduo platform, "koi fish's last possession" means that they are very lucky in the activity and get unexpected benefits.