Complex sentence: What it does show is that Gao had a deep understanding of the principles of Bagua Zhang throughout his long carrier and all these schools are representative of Gao Yisheng's teaching and philosophy.
Split into simpler sentences: What it does show is that Gao had a deep understanding of the principles of Bagua Zhang throughout his long carrier. And all these schools are representative of Gao Yisheng's teaching and philosophy.