No need, for it is functioning well

The professionalism of a firefighter cannot be determined through mathematical calculations; one can't say for sure that A is better than B just because A has worked two years more than B.

Most firefighters in China are active People's Liberation Army soldiers who serve in the fire department for two years. The experience and professionalism they accumulate in those two years can't be compared with the so-called professional firefighters in other countries. Also, soldier-firefighters have a tradition of passing down their experiences to their successors. Since the tradition has been successful, there is no question of challenging its effectiveness.

Fighting a big blaze is a difficult job, and firefighters can gain useful experience only by being on the job. Yet useful experience is not necessarily related to how many years a firefighter serves in the fire brigade.