>>64136033 (OP)
Because they're just great, way ahead of their time imo. At the time the Chinese were mostly fighting in open terrain and they developed massed fire formations similar to our napoleonic era.
They had a modern crossbow trigger group, interchangeable parts and a rear sight with multiple elevation notches. The system was not very accurate but accurate enough to hit when shooting in groups.
The fact that they used a full sized composite bow meant that they had a much higher power crossbow compared to their European counterpart.
>>64136051
In China the fakes are usually pottery, because well made fakes are indistinguishable from originals as long as there's no organic matter in the finished product. Organic materials and metals can be tested which can roughly determine when they were made, so you cannot fake them and get away with it for long. Even with pottery you still get found out, like here
>>64136214
I've never heard of the idea that all Chinese archaeology was fake until earlier this year, and suddenly it was popping up everywhere at once, not unlike South African White Genocide rhetoric, strange.
>>64138158
What do you mean "lost"? China is geographically very isolated, especially ancient China. The Chinese crossbow trigger group works with loose tolerances and was made with basic bronze melting, a technique nobody forgot.
Mass production is not a technology, it's a method.