China's soyameal futures jumped nearly 6 percent to record highs on Monday after China warned last week it would slap a 25 percent tariff on soyabean imports from the United States.
The most-active contract traded on the Dalian Commodity Exchange, for September delivery, rose 5.79 percent in morning trade to 3,378 yuan ($536.57) per tonne, on track for its biggest daily rise since June 2016.
Earlier in the session, it hit a record of 3,400 yuan.
Beijing said last week it would levy tariffs of 25 percent on a range of American goods, including soyabeans, planes, cars and several other farm products.
The steep tariff on soyabeans will significantly increase the cost of soyameal in China, with the country buying around 60 percent of globally traded beans to crush into meal for livestock.
Monday is the first day of trading on the exchange after China's two-day holiday on Thursday and Friday.
The January 2019 contract rose 5.94 percent, as investors worried the tariffs would have a bigger impact on later deliveries.
Prices of rapemeal traded on the Zhengzhou Commodity Exchange also jumped more than 5 percent in the morning session. The meal is used as a soyameal alternative in animal feed.