How to counter Hwei
Let us take a look on how to beat Hwei. We will look at champions who are strong against Hwei and who are weak against Hwei. Use win rate, gold difference and creep score difference at minute 10 to find the best 
Mid champion who counters Hwei. You can already win in champion select with the right counters for Hwei. If you want to know how to counter Hwei then you need to take into account the best picks vs Hwei and the worst picks vs Hwei. This Hwei counter data is based on matches played by Pros on patch 14.16 and previous ones. It is important to see whether Pros counter picked Hwei or whether they played as Hwei.
Champions used by Pros to counter pick Hwei
Looking at the matches from Pros (see table Pros counter picked Hwei) we can see that they picked 
Tristana most often to counter pick Hwei. The matchup Tristana vs Hwei occured 170 times. Hwei has 100 wins and 70 losses in this matchup. Learn how to counter pick Tristana to get another perspective on the data.
Lane outcome for Hwei
When looking at Hwei counters you will notice that win rates alone are not conclusional. Therefore we provide an overview (see table Lane Outcome) where you can see the lane outcome of Pros who played Hwei. The lane outcome of Hwei consists of three outcomes: Win, Loss or Draw. Let's take a look of Hwei lane and match outcome for specific matchups. Considering the lane outcome and the match outcome of a specific matchup, might enable you to find the right counter for Hwei.
Conclusion
Analyze the available data and learn how to beat Hwei. To master Hwei take also a look on Hwei builds and runes for Hwei. Good luck, Summoner!