Yen gave lectures, distributed flyers, and led county public health workers into jails in which drug offenders were concentrated in a series of efforts to spread information about the program, to show goodwill, and to establish channels for communication with addicts.
為了用針頭傳達善意，跟隱性毒患打交道，顏純左帶領縣內公衛人員深入毒犯聚集的監所，用一場場演說、一張張大多數人沒看過的傳單把訊息傳出去。