Why does Hefei 12345 keep recruiting people?

There is a great turnover of post personnel.

By querying official website, the mayor's hotline 12345, we know that Hefei 12345 has been recruiting people because someone has left, while 12345 has a high telephone traffic, heavy tasks and large turnover, so in order to ensure the connection rate, we can only keep recruiting people.

12345 generally refers to 12345 government service convenience hotline.