Sun Haoyu, a hog farmer in Dalian, in northern China’s Liaoning Province, first noticed pork prices beginning to tumble late last year. 去年底，中国北方辽宁省大连市的生猪养殖户孙浩宇（音）首次注意到猪肉价格开始大幅下跌。 With 3,000 hogs to care for, Mr. Sun said, he had “no choice but to tough it…