BI4KSR The biggest advantage of the 707 is its affordability, followed by its high availability.
Whether this approval process is feasible depends heavily on local policies. For example, in Hunan province, even expired approval codes for older devices are acceptable.
In particular, when it comes to holding shares, I still believe that if they can be listed on the Shanghai Stock Exchange, this is a very suitable option. Even if you occasionally want to engage in power trading, it's perfectly fine.