It is a relationship between husband and wife.
They are bloggers who publish their own experiences. Their famous saying is "Use our eyes to help the world see China and spread the most authentic life. Welcome to watch the video recently released by Luka and Ruili". They are It is very interesting for travel bloggers to go to cities one after another, record the customs and food of the city, and help everyone appreciate the beautiful scenery and food in various places without leaving home.