延长yán cháng
to prolong, to extend, to delay建立jiàn lì
to build, to establish, to set up建筑jiàn zhù
building, to construct建议jiàn yì
to propose, to suggest, to recommend建设jiàn shè
to build, to construct, construction开发kāi fā
exploit (a resource)开幕式kāi mù shì
opening ceremony开心kāi xīn
to feel happy, to rejoice开放kāi fàng
to lift (a ban or restriction)