Lo Man-wai was born in 1895 in Hong Kong. His father was the wealthy Hong Kong merchant and compradore of Jardine, Matheson & Co., Lo Cheung-shiu. His brother, Lo Man-kam, was also a prominent lawyer who served on the Executive and Legislative Councils of Hong Kong prior to the 1950s.
Man-wai was appointed a Justice of the Peace in 1926 and a member of the Urban Council in 1940. After the war, he succeeded Lo Man-kam's seat on the Legislative Council in 1950 and the Executive Council in 1959. For his services, he was named an Officer and Commander of the Order of the British Empire in 1950 and 1955, respectively.
He was a director of many large public companies, including Hongkong Tramways, Star Ferry, China Light and Power Company, Hongkong and Kowloon Wharf and Godown Company, and Commercial Radio Hong Kong.
A skilled tennis player, he was known as the "Grand Old Man of Hong Kong Tennis." With his brother Lo Man-kam, he won the Men's Doubles title at the 1920 Hong Kong National Grass Court Championships, as well as the singles title in 1929. From 1920 to 1922, he was runner-up to Ng Sze-kwong three years in a row in Men's Singles at the Hong Kong National Grass Court Championships. With his sister Enid, he won the Mixed Doubles title at the Hong Kong Hardcourt Championships in 1928, 1930 and 1932, thus becoming the only player in Hong Kong to have won a local doubles title with both his brother and sister.
- "羅文惠殯禮十一日舉行". Wah Kiu Yat Po. 8 April 1985. p. 8.
- "羅文惠殯禮榮衷". Wah Kiu Yat Po. 12 April 1985. p. 10.
- "羅文惠前日逝世". Tai Kung Pao. 7 April 1985. p. 5.
|Legislative Council of Hong Kong|
| Chinese Unofficial Member
Richard Charles Lee
| Chinese Unofficial Member of the Executive Council of Hong Kong
With: Chau Tsun-nin