After 16 years, Li Zhijian and his wife Peng Hongying have finally found a measure of closure in their long pursuit of justice over a medical blunder that left their son paralysed for life in Hong Kong. But the mainland Chinese couple said their fight for accountability was far from over, despite a ruling by the city’s medical watchdog that found a paediatrician guilty of professional misconduct in his care of their son, Li Yuanjian.