This (at least visually) illustrates some of the unique methods of the Chen Zhaokui line of Chen Taijiquan as relates to basic structure. This is “jibengong” basic traditional instruction for those who are physically willing and able. It is not for everyone, but the path of “zhen” (true) gongfu in this style. Here is a rare look at some non-commercial traditional training.
Traditional Chen Taijiquan “Kulian” bitter basics training