There are actually a couple of superchargers in Shenzhen. But other than that, I agree with the rest of your comment.
Secondly, car market in most Asian cities are VERY different from western cities. Owning a private car in vast majority of cases is NOT a necessity because public transportation like subway and bus are very efficient and well developed. Considering buying the same car in Asia easily cost 2-3 times more than in western countries, buying a car is less about going from point A to point B. It has everything to do with showing off your wealth and as an instant status symbol, so that people look up to you. The more expensive your car gets, the more desire for people to buy it. Vast majority of Asian society values money and fame extremely high, even more than the most materialistic cities that you can find in the western world. If you are not rich or famous, people treat you like crap in Asia and definitely won't be respected. Depending on your perspective, you can call Asian people shallow, or dark side of humanity or the result of capitalism.
In my opinion, it is very difficult for Tesla to be successful, at least not in the luxury segment, until Tesla fix the interior. It has to match the interior luxury and quality of Germany big 3. Also, Tesla's plan to create a factory in China to avoid the Chinese import tax will most likely back-fire. A cheaper Tesla most likely will NOT generate more demand in China. If the average joe on the street can get a Tesla, it just won't be perceived as a premium brand. You have to understand that owning a private car in China is extremely expensive for the average joe in China. In most cases, only the top 10% of the society can afford to buy a car. Obviously, rich people won't buy a cheap (or non-expensive) Tesla to show off their wealth and power.
Tesla is mostly an environmental/green company. Given that Chinese awareness of being green is still extremely low relative to the western world. Chinese wouldn't have care less about green if they have a choice between projecting an image of green or an image of wealth/power. Tesla is way better off to setup the 2nd factory in Europe than in China, imo.