The problem here is the initial opioid crisis hardly involved China at all. Instead it largely involved US pharmaceutical companies like Purdue Pharma's over-aggressive promotion of Oxycontin. China and fentanyl only came into the picture later.

Fentanyl is a significant issue and discussing what China intends to do about fentanyl certainly is warranted (seems like discussions are underway to schedule it in China -- https://www.cnn.com/2018/12/01/politics/fentanyl-us-china-g2... ). But one compound isn't the full problem here.