HOLDING COMPANY Centuryan Environmental Services Group Limited TRADING COMPANIES Centuryan Services Limited - Provision of general cleaning services and related environmental services Centuryan Airport Services Limited - Provision of general cleaning services to Hong Kong International Airport Centuryan Pest Control Services Limited - Provision of pest control services Centuryan Airport Pest Control Services Limited - Provision of pest control services to Hong Kong International Airport Caring Environmental Services Limited - Provision of feminine hygiene services and washroom products