What happened to Gao Enxing's neck injury on 20 15 in school?

School 20 15 Gao enxing suffered a neck injury because of an argument with a female classmate. Korean KBS TV series "School" 20 15 episode 7 Gao Enxing has a neck injury. When her sister was a baby, a female classmate asked her out because of Zheng Xiuren. The female classmate mistakenly thought that Zheng Xiuren's short message was sent by Yin Sheng, so she had an argument with Yin Sheng, and pushed Yin Sheng to accidentally fall down and hit the wound left by the wooden pole. The play started on April 27th, 20 15, directed by Bai Shangxun and Jin, and written by the screenwriter, starring Nan Zhuhe and You Cheng.