Master Sun is a disciple of GM Feng. Every year he comes to Daqingshan to help Master Chen teach the full time students. Besides being one of GM Feng’s top disciples, he is also a published author, master calligrapher and oil painter.
Here are some posts he wrote on the website
http://practicalmethod.com/2011/01/gongfu-and-techniques/
http://practicalmethod.com/2010/07/chen-zhonghua-and-his-chen-style-taijiquan-practical-method/
http://practicalmethod.com/2010/09/the-magic-45-degrees/
http://practicalmethod.com/2010/09/return-the-art-to-the-family/