I am familiar with the Chang style which was created by GM Chang Tung Shang. He was the best Shuai Chao fighter/teacher in recent history.
I study xingyiquan (a sister art to taijiquan).
The weight belt stuff sounds a little like some circle-walking (baguazhang) stuff I have seen before, good stuff.
I have heard of Sifu Ching before and I understand that he has high skills.
Welcome to the forums!