Jonathan posted on the FaceBook group that he had recently had the pleasure of training with Cheng Tinhung’s youngest son in Hong Kong. Some really good video of various Wudang tuishou/pushing hands. In fixed step free-style Jonathan got a couple of draws but didn’t score once so said he ‘must train harder’ an attitude I respect!
You can see this at https://www.youtube.com/watch?v=74LW25_qQkU or just search youtube for Cheng Kam Yan.