Some of them (such as fruit juice, milk, tea, soft drinks, water, and tofu) were given the derivative brand name "Vita".

It specialises in the operation of the tuck shops in Hong Kong primary and secondary schools and the canteen business.

"Vitasoy" also established "Hong Kong Gourmet"[4] in 2001 to provide catering services to primary and secondary schools, and meetings.

Vitasoy was founded by Lo Kwee-seong (1910–1995)[5] on 9 March 1940 in Hong Kong with door-to-door delivery of soy milk, selected as a product because many Chinese people are lactose intolerant.

In 1975, Vitasoy became the first Hong Kong company to introduce Tetra Pak packaging technology for drinks production.

This involves UHT (ultra-heat treatment) sterilisation of the product and packaging in aseptic cartons so the drink could be kept for months without refrigeration.

With the divesting of Nasoya in 2016, Vitasoy moved to a small office in Woburn, Massachusetts, with no production facilities in North America.

Several days prior, a Vitasoy employee had randomly stabbed a Hong Kong police officer from behind, causing a 10 cm deep wound that reached the victim's lungs.

The share price of Vitasoy at the Hong Kong Stock Exchange plummeted 12% on Monday 5 July 2021, the first trading day after the memo went viral on social media.