Let's start with the conclusion: if we ignore everything else and just talk about functionality and price, older, well-established ham radio brands that have a large presence in the used market are also a good option. You can get one for around 700 to 800 yuan, and you can use an antenna costing around 100 yuan to start experimenting on common shortwave frequencies. Even with just 100 watts of power, you can have fun.
HoweverMost of these old radios are not eligible for the Shanghai Stock Exchange, at least as far as I know. The only one I'm aware of that might be eligible is the icom718, but its legality is definitely questionable. Furthermore, given their age, these radios are bound to have aging circuits, which may not comply with regulations, and the components are likely nearing their end-of-life. If you try to repair them yourself, it will be a frustrating experience. Even if you buy a set of tools like an oscilloscope, multimeter, and soldering iron, they could cost more than the radio itself. Therefore, I don't recommend these as a primary option.