[经] investigate conditions at the grass roots

duì jī céng qíng kuàng zuò diào chá yán jiū ㄉㄨㄟˋ ㄐㄧ ㄘㄥˊ ㄑㄧㄥˊ ㄎㄨㄤˋ ㄗㄨㄛˋ ㄉㄧㄠˋ ㄔㄚˊ ㄧㄢˊ ㄐㄧㄡ