Have you ever wondered what the term "ground floor" means? In most places, it's the level of a building that is closest to the ground. But in #Chongqing, a city in southwestern China, the concept of "ground floor" takes on a whole new meaning. In fact, the question, "Which floor is the ground floor in Chongqing?" has become a hot topic on Reddit, highlighting the confusion and intrigue surrounding the city's unique architecture. Click the video to see how CGTN AI host Ainia explains it, and expe