重振旧业chóng zhèn jiù yè

start up one’s former business again
❍ 不说别人，就说我吧，几乎弄到家破人亡，侥幸保住这条老命，才又回到上海，～。(周而复《上海的早晨》上—440)You need look no farther than my own personal case; my whole family was brought close to ruin,and I was lucky to be able to preserve this old life of mine and come back to Shanghai to start up my former business again.