众志成城（衆志成城,眾志成城）　

◎ 众志成城 zhòngzhì-chéngchéng

[unity is strength;when people are unified with a single will,they are as strong as city walls] 万众一心,像坚固的城堡一样不可摧毁。比喻大家团结一致,力量就无比强大