[wéi chí]
keep; maintain; preserve; hold
support oneself or one's family
维持生活
maintain the status quo; let things go on as they are; hold fast to the status quo
维持现状
affirm the original judgement
维持原判
keep the peace; maintenance of peace
维持治安
maintain market
维持市场
Policemen preserve [maintain] order in the streets.
警察在街上维持秩序。