走街串巷

zǒujiēchuànxiàng

走街串巷 — zǒujiēchuànxiàng

1. to go from street to street and alley to alley; to canvass or roam the streets (often on foot)

   那些义工经常走街串巷宣传环保知识。 nàxiē yìgōng jīngcháng zǒujiēchuànxiàng xuānchuán huánbǎo zhīshí — Those volunteers often go from street to street promoting environmental protection.