What should I do if all the employees of the property management company are transferred to the new property management company when they expire?

Simple compensation depends on the way you change the subject of the contract, whether you resign or dismiss. If you resign first and then join the new company, the law does not support the relevant payment compensation clause in principle. If the original company withdraws from the project by dismissal, it can ask for compensation according to everyone's different situation.

But I advise you, if the company has never owed you anything, it doesn't matter whether you want to pay compensation or not. You can't make up much, so why bother? It's not like there's no new job. You haven't changed jobs, you are still doing those jobs, but the salary has changed. Property companies are all low-profit enterprises, and their profits are much lower than you think.

And if you want to compensate, your new company will definitely look unhappy, that's for sure.

The above is based on the fact that the company has not offended you. If the company infringes on your rights, say something else.