A lot of that had to do with trade restrictions. In the 20s and 30s they wouldn't let China buy military arms (i.e. rifles. SMGs, etc.) and so instead they bought a lot of pistols like the C96 and Astras which didn't have restrictions on them. In the 20s or 30s I wouldn't feel undergunned with a C96 with shoulder stock by any means. They were basically a semi-auto carbine with a relatively long range pistol cartridge that was fairly fast (for the time) to reload.