Polygyny or polyandry (一夫多妻或一妻多夫)

Whose role is it to determine whether polygyny or polyandry is morally acceptable?

Statistically, female out numbers male. However, modern China today has more male than female. What should be societies moral response to the difference in number of the two gender? Is polygyny or polyandry a possible answer?

誰可以確定一夫多妻或一妻多夫在道義上是可否以接受的？

據統計，女性的人數比男性多。然而，現代中國男性比女性多。什麼樣的社會道德反應方可解決兩性人數的差異？一夫多妻或一妻多夫制是否答案？