visa for China for British passport holder

Hello. İ am a British subject with British passport but i am also a Turkish cypriot with identity card for North Cyprus what would i need (what documents) for a visa because my husband and İ and 3 other friends would like to visit China in April (İ live in North Cyprus).. Also we are a group of 5 how much each person for a group of 5 How much Euros. Thank you in advance