Kwok was awarded the "10 Outstanding Youths of Hong Kong" award in 1977 for his contribution to Hong Kong football after helping Hong Kong reach the final round of World Cup qualifiers, along with Hong Kong movie director Michael Hui.
Although the two teams drew 0–0 in their first match in Hong Kong, China PR was considered to be stronger and was favoured to win the group. Due to superior goal difference, China only needed a draw to proceed to the next round. However, a 20-yard freekick by Hong Kong's Cheung Chi Tak (張志德) opened the scoring. China PR replied with Li Hui (李輝)'s goal but another well-taken goal by Ku Kam Fai (顧錦輝) sealed the win for Hong Kong and sent China PR out of the 1986 World Cup.
The loss to Hong Kong delayed China PR's World Cup entry for another 16 years before they finally appeared in 2002 Fifa World Cup. After the game, Chinese fans rioted outside the stadium, while the Hong Kong team received a heroic welcome at the Kai Tak Airport.
The victory was passionately remembered by Hong Kong football fans as "The 5.19 Victory".
1986 FIFA World Cup Asia Qualifying Playoffs
Hong Kong thus earned the right to play Japan for two home-and-away ties in the second qualifying round. Kwok led the team to Kobe where they lost the first leg 3–0.
The return leg at the Hong Kong Stadium was a complete sell-out but the home side lost 2–1 after missing a penalty [3] and several other chances.
Japan went through 5–1 on aggregate but then went down 3–1 on aggregate to South Korea in the final round and missed the chance to qualify for the finals in Mexico in the following June.