Ai Tingya's golden lock was customized by Ai Zhaojiang's old friend.
In the past, when he chatted with his neighbors, he would always see others carrying children around. Ai Zhaojiang was very envious, but his son did not seem interested in marriage, so Ai Zhaojiang made a golden lock to tactfully urge him to get married.
Every time he suffered a critical hit from his neighbor, he would take out the golden lock and play with it in front of his son.
However, Ai Zhaojiang found out that it was not that his son was not interested in marriage, but that his son had a girlfriend he was secretly dating later on. However, his girlfriend's status was special. He knew that Ai Zhaojiang would definitely look down on her, so he had never publicized it.
Later on, the father and son fell out and Ai Tingya's father ran away from home.
After so many years, Ai Zhaojiang thought that the golden lock had long been lost. He didn't expect his son to take it away.