Last week I came across an interview of Yang Jun on a Bay area Chinese TV station (see: https://m.youtube.com/watch?v=yoaU6lRQ_KE). One statement that Yang Jun made was that his great grandfather (Yang Cheng Fu) had two notable students, Cheng Man Ching and Dong Ying Jie. Cheng Man Ching came to the US to teach and was very well known. Dong Ying Jie stayed in China. I wasn't familiar with his name. I later realized that he is known in the USA as Tung Ying Chieh. There are some video's of Dong Ying Jie on youtube but his name is written in an older style as "Tung Ying Chieh". Here's a link showing his Tai Chi form:
Here's a link to a video of Cheng Man Jing:
It's interesting to compare the two since they were both students and classmates under the tutelage of Yang Cheng Fu. By watching them you would think they had different teachers!
Finally, here's a video of Tung Hu Ling. His father was Tung Ying Kit and was also a student of Yang Cheng Fu. I found a bio on Tung Hu Ling and it stated he learned from his father but was also tutored by Yang Cheng Fu but he must have been very young when that happened. He was born in 1917 and Yang Cheng fu passed away in 1936. In any event I like his Tai Chi.