A mother-in-law of a rural power grid worker can be a public welfare post. The reason why the mother-in-law of rural power grid workers can do public welfare jobs is because the work of rural power grid workers needs all-weather investment and their families need to be taken care of. Some rural power grid workers' mothers-in-law need to take the responsibility of housework and family care, and letting them take up public welfare posts can help them better balance their work and life. In addition, public welfare posts can also provide some economic support for the families of rural power grid workers, thus better supporting the work of rural power grid workers.