Chinese Premier Li Keqiang is on his way to Wellington for a visit that's considered significant for the relationship between the two countries.
While he's in the capital Premier Li will hold formal talks with Prime Minister Bill English, followed by a joint media conference.
There will be a signing ceremony to seal an agreement which won't be revealed until their names are on it.
The two have met before, when Mr Li was deputy premier and Mr English deputy prime minister.
They're expected to discuss the already strong relationship between China and New Zealand, the free trade agreement which is due for an upgrade, and the future of free trade in the world generally.
China is a strong supporter of trade liberalisation, in contrast to the attitude taken by President Donald Trump's US administration.
This year marks the 45th anniversary of diplomatic relations between New Zealand and China, and personal contact between the leaders is considered an important part of that relationship.
Premier Li leaves New Zealand on Wednesday.