How to evaluate Adam Cheng's acting skills?

His acting skills are extraordinary. Many people's childhood nightmare is the role played by von Jacky in Don't Talk to Strangers, but my childhood nightmare is that when Ding Xie appears, he will do something bad. In addition, he played the villain Ye Gucheng. He gave me two very different impressions of Gan Long and Ding Xie, and there was no conflict between them. I don't think Ding Xie is not so annoying just because Gan Long is handsome. In addition, before that, he also played Gan Long, Chen Jialuo and Fu Kang 'an alone, and Jin Yong sent a letter to Adam Cheng for this purpose, which shows that Jin Yong is more knowledgeable than Gu Long.