1971.1.31南华早报：年后返港游客谈大陆观感--广州到处挖防空洞

 广东农民养的猪不少，要交售给政府。广东乡下仍然很尊重老人。

China builds N-war tunnels
South China Sunday Post - Herald (1950-1972); Jan 31, 1971;
ProQuest Historical Newspapers: South China Morning Post
pg. 3