更新换代

reform and renewal / generational change

to change or replace / to experience / one of the five two-hour periods into which the night was formerly divided / watch (e.g. of a sentry or guard)

more / even more / further / still / still more

to replace the old with new / to renew / to renovate / to upgrade / to update / to regenerate

abbr. for Xinjiang 新疆[Xin1 jiang1] or Singapore 新加坡[Xin1 jia1 po1] / surname Xin

new / newly / meso- (chemistry)

to exchange / to change (clothes etc) / to substitute / to switch / to convert (currency)

to transition to a new dynasty or regime / to replace an older product with an upgraded, new-generation one

to substitute / to act on behalf of others / to replace / generation / dynasty / age / period / (historical) era / (geological) eon