Who is the authentic Yang Style Taijiquan Fu Nei Pai and Competition Routine?

One is your age, if you are young and want to do some work in Taijiquan, I suggest you practice the competition routine, which is Yang's 40 style Taijiquan, this routine is evolved from the big frame, which is in line with the norms of Taijiquan, and due to the shorter time of practice, it can also be used for performance in the future. If you are older and just want to get fit, I recommend practicing Zheng Zi's Simple Taijiquan, which is softer and more effective.

Third is your foundation. If you have the foundation of Xingyi, Bagua and other internal boxing, but also have enough time, you can practice Fu Nei school, because the school has ten sets of frame, and need to have the foundation of the people can see the doorway, otherwise, it is a hilarious; if you have the time, there is no foundation, I recommend that you learn from Fu Zhongwen's frame, because at present, Fu Zhongwen's students, books all over the world, and its teachings are more subtle, you can save a lot of trouble.