Calvin Chang first attended the annual Hong Kong Sevens competition five years ago with a wig on his head - and knowing nothing about the game of rugby.
However, today Calvin could not live without the sport. He is now a member of Hong Kong's under-16 rugby union squad.
Last weekend's tournament was the fifth Hong Kong Sevens attended by the 15-year-old student from POH Chan Kai Memorial College in Tai Wai. Years after his first visit to the stadium, he watches the Hong Kong team carefully and learns from his hometown heroes.
Calvin first got involved in the sport by joining Twister Rugby Football Club, in Tin Shui Wai, when he was 11.
'Not long after I joined, they asked me if I was interested in watching the Sevens. I just accompanied them and I didn't quite understand the game,' Calvin says. All he remembers about that year is that someone gave him a wig to wear. From the second year on, he became more aware of the games when watching the Sevens.
'Sevens is always a great rugby lesson for me,' Calvin says. 'Every year I watch the beautiful steps and change of speed by players in the matches and try to copy their moves afterwards.'
He says seeing the skills demonstrated by the top teams has really helped him to improve.