An elderly man defending a seat dispute on a train got shockingly slapped by a bystander in eastern China.

The schooling video was filmed in the city of Qingdao in Shandong Province on September 4.

Two elderly women quarrelling over a seating issue, with the elderly man chiming in. One of the women accused the elderly man's companion of occupying two seats, to which he retorted, "Even if I took up 10 seats, it's none of your business."

Out of nowhere, a young man standing nearby delivered a slap to the elderly man's face, retreating while exclaiming, "You dare to hog seats and still argue about it?"

The shocked woman stood up, questioning the aggressor's actions, and the elderly man pursued the young man.

Two days later, on September 6, Qingdao's Subway Police Department responded, stating that the incident was settled on the very day it occurred, and was classified as a simple dispute.

The young man had apologised to both seniors, who accepted his apology, choosing not to press any legal charges.

The video was provided by local media with permission.

9月4日，山东青岛，地铁上两位大妈因座位问题争执，一旁大爷上前帮忙理论，忽然被一陌生男子掌掴扇脸。
视频显示，地铁上两位大妈因为占座事宜发生争吵，旁边一位大爷帮腔。大妈质疑大爷的同伴“一个人占俩座”，大爷则回答“一个人没有，我占10个你也管不着”，这时站在一旁的陌生男子盯着大爷，突然就是一巴掌，然后边后退边说“混蛋，占座还有理了”。大妈从座位上站起询问打人小伙“你打人做什么”，大爷也追赶上去。
9月6日，青岛市公安局地铁分局回应称，该事件在发生当天就已调解完毕，事件被定性为纠纷，当事小伙已向两位老人道歉，两位老人表示接受道歉，不追究任何法律责任。