Reverse Engineering Algorithmic Mechanism Behind WeChat Red Envelope

WeChat Red Envelope

Summary

The prevalence of the online WeChat red packet has raised an attractive question of how to get the most money (i.e., be the luckiest person). In this way, more and more people study which factors would affect the amount of money when opening the red packet. In this report, we focus on the relationship between the time to open the red packet and the amount of money. Specifically, we explore two factors of time, including interval time and order. Our experiments result show that only for each order, the distribution and the conditional distribution of the amount of the money are close to skew distribution and uniform distribution, respectively. Moreover, our results also show that if you want to get more money you should take on some risks of getting less money at the same time.

Key Words

WeChat red packet, expectation, variance, skew distribution, uniform distribution

Yinxu Tang
Yinxu Tang
PhD Candidate at Washington University in St. Louis, USA

My research interests include Explainable AI, Artificial Intelligence, Bandits and Reinforcement Learning.