First of all, both men and women now tend to be precocious! Secondly, the tradition of rural people is early marriage. The reasons include that parents hope so, they can't save money if they don't get married, and there is no concept that city people have a career before they have a home! Moreover, rural people think that it is not easy to get old, and there are indeed more men than women!
Finally, getting married is an exciting thing for most rural people