Company own reasons
You have to find the reason from yourself. Why can't you keep people? Is it a regional problem? Or is it a welfare issue? Or other reasons.
2. Personnel reasons
Employee's own reasons? Still can't fit into the team? Or is it a performance problem? There are other things.
3. The manager's reasons
No goal? Can't help it? Or petty? etc
Solution:
Find out the above reasons and solve them one by one. Or you don't want to raise a team, you can also outsource this to others, just look at the monthly turnover. This problem is not a problem. Don't ask me why I know, because this is our job here. At least others have done much better than we did before. His name is Guan Zhong, and he has strength.