Answered by Borut | Oct. 16, 2024 23:42
The most important detail is that both of you do not need any kind of visa. You will have two separate situations, though:
1. The citizen of New Zealand can enter China visa free for up to 15 days, so she/he does not have to bother about visa free transit formalities and other related stuff. So, the citizen of NZ will fill out an arrival card on board of the plane that will take you to Changsha. She/he will tick the transit box on the arrival card. Upon landing in Changsha, she/he will just follow you, but she/he is free from any applications and similar.
2. The citizen of UK will not fill out an arrival card on board the plane. Upon landing in Changsha, she/he will approach 24/144 hour visa free transit counter where she/he will apply for a temporary entry permit by presenting her/his flight itinerary. The citizen of NZ will be there, but not doing anything. This application is a formality and also free of any charge. After a short check, the UK citizen will be granted a permit and then both will proceed to the immigration because your next flight segment is a domestic one. By the way, usual length of stop in Changsha is 3 hours and 15 minutes.
As you can see, there are some differences and the reason is, NZ citizen does not need a visa to enter China at all, will the UK citizen need one. However, in this particular case, even the UK citizen will travel visa free covered by 24 hour visa free transit.
Upon your landing in Haikou, you will just cross the immigration to exit China and head to the gate of your flight to Auckland.
Although this could look complicated at first, in reality it is not. You have both layovers long enough to perform everything at relaxed pace and in the same time the layovers are not too long to make your bored. Have a nice journey.