SINGAPORE - Mr Zhuo Yuan Long's love for singing started when he was a child and would sing anything from Hokkien to Malay numbers. When he was working as a crane driver in the early 1960s, he often sang as he worked, earning him the nickname "Do Re Mi". Mr Zhuo turned 85 recently, but his love affair with singing has continued unabated. He had wanted to put up a concert on his birthday on Dec 12 at the Singapore Conference Hall and had even invited guest singers. But Covid-19 struck. "As a singer, I love to perform. But I haven't been able to put up any recitals this year because of Covid-19," said Mr Zhuo, who used to run his own crane business but retired in 2000.