China's pork industry braces for trade war blues Twice a day, Chinese pig farmer Jia Tiechui's workers flip levers to deliver plops of soybean-based feed to 18,000 hogs, whose appetite is getting costlier as the US trade war bites. The price of the powdery grain mixture, which is one-fifth soy, has risen since China imposed 25-percent duties on US soybean imports last month, escalating a trade spat between the two economic giants.