Why don't electronics factories be built in places with low labor costs?

Roughly several aspects, first, manpower, electronics factories need a lot of people, and crowded places are conducive to recruiting people. Electronic factories generally take over the intermediate production tasks, so there are many times when communication is needed, and it is not conducive to contact tasks because it is too remote. The third is sales. Like the second reason, places with low labor costs are generally sparsely populated and remote, so it is difficult to receive big customers.