“妈妈，这次换我背你！”五一假期，这个背影刷屏了……

Core Viewpoint - A video of a man carrying his elderly mother on his back while traveling has gone viral, highlighting themes of filial piety and family bonds in modern society [1][3]. Group 1: Background Information - The man, named Chai Wanbin, works for the government in Huaiyuhe Town, Liangshan Prefecture, Sichuan Province [1]. - His mother, Zhang Yunzhen, is 88 years old and has been using a wheelchair since an accident four years ago [3]. Group 2: Family Dynamics - Chai Wanbin is the youngest of four siblings and has a close relationship with his mother, who favored him during his upbringing [3]. - He often visits his mother during holidays, bringing along a wheelchair and a special carrying strap that was used by his mother to carry her grandchildren [5]. Group 3: Travel Experience - On May 1, the family visited Huanglongxi, and due to some inaccessible areas for the wheelchair, Chai used the carrying strap to transport his mother [5]. - The carrying strap is not the primary means of transport; it is used only in difficult areas, and they have a wheelchair for most situations [5]. Group 4: Public Reaction - The video has received positive feedback online, with comments praising the man's dedication and the essence of family love [3][9]. - Chai Wanbin expressed that he did not see his actions as extraordinary until he was moved by the public's response to the video [9].