I had all the types of pan/wok mentioned. Carbon steel wok still the best for stir fry. Cast iron give good char on food. Non stick easy to use for making those food that easily stick like eggs or fish.
I have been so confused with all the Chinese cooking, on whether i can use non stick to do stir fry/ whether I should get a cheap carbon steel pan/ whether it is worth getting a cast iron pan, since the pandemic hit and I started cooking daily at home. Thanks to your clear cut video and straight to the points I have now grab a very clear basic understanding on all the woks/pans. Bravo and keep on the good work xiaogaojie!! love xx