1970-1980. In school and in society, the government encourage all people to 'use the hand campaign' to clean up our school, our environment for all people. I like especially our former PM, Mr Lee Kuan Yew, who implemented Singapore River cleaning programme & tree planting programme, and we get to see these people go around Singapore use their hands together with their people to work hand in hand in the building of Singapore. (Memory collected at the Geylang East Public Library during "The Singapore Story: My Heart, My Hope, My Home" campaign from 6 Sep to 31 Dec 2012)