Eight soybean-related futures and options, including No 1 Soybean, No 2 soybean, soybean meal and soybean oil, are officially open to foreign traders at the Dalian Commodity Exchange on Monday in Dalian, Liaoning province. "It is the first time for the DCE to introduce overseas traders in the full soybean commodities," said Fang Xinghai, vice chairman of China Securities Regulatory …