In 2021, China produced 272.55 million tons of corn, about 15 million tons of soy(the domestic type I think are mostly for human consumption in the form of tofu).

I knew a chicken farmer in HK and many years ago he told me he couldn't compete with the industrial chicken farms in the ML.

Food waste should be fed to insects which then fed to chicken. A simple fact of husbandry, the small the organism, the faster it grows to size, ie more fodder efficient

Chinese eat a lot more pork than beef---from China stats breau

全年猪牛羊禽肉产量8887万吨，比上年增长16.3%。其中，猪肉产量5296万吨，增长28.8%；牛肉产量698万吨，增长3.7%；羊肉产量514万吨，增长4.4%；禽肉产量2380万吨，增长0.8%。禽蛋产量3409万吨，下降1.7%。牛奶产量3683万吨，增长7.1%。

http://www.stats.gov.cn/tjsj/zxfb/202202/t20220227_1827960.html