Four visiting instructors from a US college have been injured in a stabbing attack in a park in north-eastern China, the university confirmed on Tuesday. Cornell College, which is located in the US state of Iowa, confirmed upon request by dpa that four of its instructors, who are in China as part of a partnership with a Chinese university, were injured “in a serious incident during a daytime visit” to a public park in the north-eastern city of Jilin. “We have been in contact with all four instructors and are assisting them during this time,” College President Jonathan Brand said. “There were n…