Why are electricians on Weihai fishing boats so highly paid?

There are several factors:

First, the fishing grounds in Weihai are good, with high yields and good profits, and everyone’s wages are high.

Secondly, there is a shortage of electricians in Weihai, so things are rare and expensive.

Thirdly, the ship bosses there pay more attention to electricians. They believe that since electricians have high technical content, their wages should be high. Bosses in other places don't think so.