First of all, there is no store fee (MS is). One less expenditure equals one more income.
And many people like to visit online shopping malls.
But many people on the Internet don't know that Tang-style cheongsam is not suitable for them.
Things like cheongsam, with more or less cloth, will feel different when worn.
So this is probably the reason why the number of buyers may be small.
Of course, I haven't tried whether it is safe or not.
Well, if you're in Shanghai, you can go to clothing wholesale such as Qifupa, or look at companies and units. You can also ask the shop assistant who sells cheongsam.
But the cost of the latter method may be higher.