Thus the people of the village have agreed that three years down the road, all those working outside the village--with the exception of civil servants--should return. You could say this was a bonus "byproduct" in reward for all their efforts.
於是村民共同約定，三年之後，除了公務員之外，在外地工作的人全部都要回來，這或可視為他們努力之後所得的副產品。