At least 48 people were injured by melting wax during the two-day Mid-Autumn Festival celebrations. Eleven, aged between seven and 14, remained in hospital last night, with their conditions described as stable. Yesterday, more than 1,100 people took part in a territory-wide cleanup. Dr Ho Kin-chung, chairman of environmental protection group Greenpeace, and Lam Cheng Chiu-lan, a cleaner at Victoria Park, both said there was less melted wax this year. 'Education and penalties for playing with boiling wax have made people realise the danger,' Dr Ho said. Mrs Lam said: 'There were fewer people playing with wax.' The maximum penalty for boiling wax is a fine of $2,000 and 14 days' imprisonment. Greenpeace gathered more than 20 schools and other voluntary service centres to help clear refuse.