The Chen style practitioner, however, follows a more stringent requirement. According to Chen Fake (1887-1957), the last great proponent of the Chen style in the modern era, the external appearance of the form is not important. A correct Chen style Taijiquan form should be based on the same fundamental principle and each element of a form should have a purpose. In Chen Fake's words: "This set of Taijiquan does not have one technique which is useless. Everything was carefully designed for a purpose." ("这套拳没有一个 动作是空的, 都是有用的")