Five Tigers is what they are called, the five young and rising stars of TVB in the early 80s.  Even though they were called Five Tigers, they had only worked in two productions - a mini-series <Yang's Sega (1985)>, a reunion movie <Tigers (1991)>.  Tony was the youngest of the Five Tigers, he actually only paired with Andy and Felix, to a small extent.   Other than their screen appearances, Five Tigers are not really close buddies.  Felix and Miu Kiu Wai have been good friends for years, but otherwise they all have their own sets of friends outside of the group. Incidentally, the name of Five Tigers has more symoblic meaning - it marks the highlight of TVB at the golden 80s when they had an unusual crop of talents and star powers.

TV Series & Films Tony are in with:

Andy Lau Tak-Wah

Eagle Hunter (1982), Duke of Mount Deer (1984),  Yang's Sega (1985), Tigers (1991), Days of Being Wild (1991), The Banquet (1991), Don't Fool Me (1991), come fly the Dragon (1993), Infernal Affair I & III (2003, 2005)

Felix Wong Yat Wah

Heung Shing Long Tsz (1982), Yang's Sega (1985), Grand Canal (1986), Tigers (1991)

Kent Tong Chun-Yip

Heung Shing Long Tsz (1982), Yang's Sega (1985), Tigers (1991)

Miu Kiu Wai

Yang's Sega (1985), Tigers (1991)