This photo taken on May 10, 2019 shows soybeans imported from Ukraine being unloaded at the port in Nantong, in China's eastern Jiangsu province. - Imports of soybeans from the US, once China's biggest supplier, have dropped massively since a trade war between the US and China began in 2018. (Photo by STR / AFP) / China OUT

This photo taken on May 10, 2019 shows soybeans imported from Ukraine being unloaded at the port in Nantong, in China's eastern Jiangsu province. - Imports of soybeans from the US, once China's biggest supplier, have dropped massively since a trade war between the US and China began in 2018. (Photo by STR / AFP) / China OUT

This photo taken on May 10, 2019 shows a worker displaying soybeans imported from Ukraine at the port in Nantong, in China's eastern Jiangsu province. - Imports of soybeans from the US, once China's biggest supplier, have dropped massively since a trade war between the US and China began in 2018. (Photo by STR / AFP) / China OUT

This photo taken on May 10, 2019 shows soybeans imported from Ukraine being transferred to a barge at the port in Nantong, in China's eastern Jiangsu province. - Imports of soybeans from the US, once China's biggest supplier, have dropped massively since a trade war between the US and China began in 2018. (Photo by STR / AFP) / China OUT

This photo taken on May 10, 2019 shows soybeans imported from Ukraine at the port in Nantong, in China's eastern Jiangsu province. - Imports of soybeans from the US, once China's biggest supplier, have dropped massively since a trade war between the US and China began in 2018. (Photo by STR / AFP) / China OUT