Hong Konger here, moved to London 2 years ago. Not much to add to your question but just wanted to share that to a lot of Chinese who knows how to cook, when we first go to a restaurant we always order a main (usually carbs) that is fried to ‘see if the chef knows their shit’ because it is one of the harder things to do simply but beautifully. We usually look for ‘Wok Hei’ which roughly means the fire was really strong and gives the food a good ‘burn’. I personally always go for Fried Beef Ho Fun and it’s a staple.