At just nine years old, Hong Kong’s Wong Tsz-ching is already approaching the end of his competitive balance bike career. A keen rider, Tsz-ching started at four years old and entered his first race six months later. His five-year-old sister, Wong Tsz-yau, followed suit, competing at two and a half. However, even though Tsz-ching has faced the best riders across Asia and represented Hong Kong at a world cup-level balance bike event in Japan, back home he has nearly run out of tracks. While...