Qing wen, (sorry i can not type in Chinese on this computer ) I have got British and Chinese passports. I knew officialy if i joined in other county citizenship I cannot keep the Chinese one. If I trevel from UK to China then to New Zealand.Can i use Chinese one when i back to China and use the British one when i go to NZ?Thank you.

不要这样，这是犯法的，算非法入境，被抓住很麻烦很麻烦。

不可能，除非你单独回中国然后回英国。中国是不承认双重国籍的！