N Korea blasts a Hydrogen bomb - triggering a 6.1 scale quake, panlm_2017-09-03 14:15:29

indicating it has mastered the technology of making small nuke heads that may be installed in a missile.

China strongly comdemned NK's new nuke test, but could not prevent it from doing so.

What is next action that the UN can do? 

中国提议双暂定。美韩不停止的军演，作为朝鲜，她的选项不多。与其咋都是死，还不如一搏。