Why don't craftsmen who make longevity trees do it themselves? What is the story here?

Shoumu is a coffin that people often say, and the person who makes Shoumu is called Shoumu Carpenter. This profession is rare now, because most people are cremated. There may be long-lived carpenters in rural areas, and long-lived carpenters are highly respected in rural areas because people think that their job is to do good deeds and accumulate virtue. But for longevity carpenters, they have an unwritten rule that they will make longevity wood for others, not for themselves. This unwritten rule has actually been formed for a long time, and there are several reasons for the formation of this rule. Let me give you a brief introduction.

The first reason is that Shoumu is the home after death, and Shoumu carpenter can also be called to some extent. Building a house? People, and if Shoucarpenter makes Shoumu for himself, that is to say? Claiming to rob a tomb? Therefore, it is unlucky for longevity carpenters to make longevity wood for themselves. Not only can Shoumu not make it himself, but even if Shoumu wants to save money, Shoumu's family will not allow him to make it for himself.

The second reason is that making a long-lived wood is a very hard thing for long-lived carpenters, which tests their skills very much. As a long-lived carpenter, you must make long-lived wood all the year round, and making long-lived wood is a hard work, with many processes, such as carving, polishing and sawing wood. After these tasks are completed, there are some follow-up procedures, which are very troublesome. For a long-lived carpenter, he has been working hard for others all his life. Of course, he has to be made by others for himself.

The third reason is that there are not many long-lived carpenters in rural areas, and long-lived wood is generally made in advance. If the birthday carpenter makes himself a birthday tree, it means that the birthday carpenter is a dying man. Moreover, this thing is very unlucky in the countryside, which will make people in the same village have the idea of staying away from bad luck, so in order to avoid such a thing, Shou Carpenters will not make their own longevity wood.