I Am Interested In The Characteristics of Chinese Crossbows

Someone, citing McEwen, has told me that the draw-length of the Han Dynasty crossbows is as high as 24 inches. This surprised me quite a bit, since I have always thought that crossbows should have a low draw -length. I have assumed that, if the draw-length was too long, the wooden stock would warp. However, since hearing this new information, I began to see how my old assumptions were wrong; checking the internet, I found out that even a long (significantly longer than 24 inches) and relatively very thin wooden cane can support 250 to 350 lbs of weight. But I would like to make sure with you guys: during Han Dynasty, did the crossbows have a 24 inch draw-length for draw-weights that were as high as 400+ lbs?

Secondly, I would like to confirm with you guys about the brace-height of the crossbows. I have two pieces information that were given to me:
1.This was from the person who is a professional crossbow maker but is not very familiar with Chinese crossbows. He said that, for regular crossbows, the brace-height would be between 3-4 inches. As for the composite-recurve crossbows (the ones I?m interested in), the brace-height would be between 4-5 inches.
2.This was from the person who is more familiar with the Chinese crossbows. He, citing McEwen, stated that the brace-height of the composite-recurve crossbows found in China would be between 4-6 inches.
These are reliable people who have cited reliable sources. However, I was wondering if there are any other sources that can provide me more specific examples and