Dejan SarkaKun Ren has used R for nearly 4 years in quantitative trading, along with C++ and C#, and he has worked very intensively (more than 8-10 hours every day) on useful R packages that the community does not offer yet. He contributes to packages developedby other authors and reports issues to make things work better. He is also a frequent speaker at R conferences in China and has given multiple talks. Kun also has a great social media presence. Additionally, he has substantially contributed to various projects, which is evident from his GitHub account: - https: //github.com/renkun-ken - https: //cn.linkedin.com/in/kun-ren-76027530 - http: //renkun.me/ - http: //renkun.me/formattable/ - http: //renkun.me/pipeR/ - http: //renkun.me/rlist/ Read More Read Less