How did Lao Ding die?
I was constipated and suffocated.
When you first hear about the bizarre incident of Lao Ding's death due to constipation, people may think that it is just a light joke. 
Lao Ding has been marginalized all his life. Not only did he become unknown, but his career was frustrated and his life was unsuccessful. Throughout the plot, he is always dubbed "Lao Ding", an impersonal title, highlighting his marginal position in society. Lao Ding's son has a name, Lao Ding's daughter-in-law has a name, and even his relatives in Jiang Defu's countryside have names. But Domino really couldn't remember Lao Ding's name.
Jiang Defu has always called this comrade-in-arms Lao Ding, An Jie has always called this neighbor Lao Ding, Wang Zhenbiao also called this subordinate Lao Ding, Ge Meixia called him Lao Ding, and Jiang Dehua also called him Lao Ding.
In short, Lao Ding is actually not old, but he doesn't deserve a name.
Although his name eventually appears on the tombstone, how many people really remember this? This phenomenon reflects his marginalized and forgotten fate in society. Lao Ding is not just a name, but a marginalized representative. In his career and life, he is always on the passive side. Whether he is replaced at work or neglected in his family, Lao Ding is under a silent pressure. This marginalization and oblivion made his life full of helplessness and bitterness.
Lao Ding has experienced countless grievances in his career and life. He stayed in school for Jiang Defu, but was eventually replaced by Jiang Defu and transferred to the island. Marriage is also full of twists and turns, and I have to give up the person I like and choose my son and the expectations of society. This kind of compromise and sacrifice filled his life with helplessness and grievance.
Lao Ding's life is always in constant struggle. He gave up his pursuits and desires for the sake of his family and responsibilities. 
At work, he always silently endures pressure and injustice. In the family, he also experienced all kinds of twists and turns and setbacks. This kind of suffering and helplessness made his life full of bitterness and helplessness. Lao Ding's death on the toilet symbolizes his inner depression and grievance. He endured and compromised all his life, and eventually this repression led to his tragic end. This also echoes the helpless lamentation of fate and time by the characters in the play, revealing the impermanence and uncertainty of life. Lao Ding's death is a relief from reality and a kind of helplessness to life. He endured too much pressure and struggle in his life and finally chose such a way to end. This ending is not only embarrassing, but also thought-provoking. 
The plot of Lao Ding's death on the toilet in "Parents' Love" is not a simple joke, but a profound reflection of the character's fate and inner state. This plot is not only the inevitable result of the development of the plot, but also the profound ** of human nature and the meaning of life. However, should we think more deeply about Lao Ding's death and the meaning of life we experience in such a plot arrangement?