Costco China: Exploring Shanghai's Warehouse Giant

We didn't expect an American warehouse store like Costco exists in China. We toured a massive Chinese Costco, in search of unique items as well as the prices of staple items. This way, we can learn more about the cost of living in China, including the cost of groceries and electronics and clothing, as well as explore more of their local food. It's a good way to see if China is expensive or cheap. Are grocery prices cheap in China? Is China expensive? is China cheap? What can $100 get me in China? What are some strange things found in Chinese supermarket? What is the cost of living in China? Is it cheap to travel China? Is it expensive to travel China? Is China worth visiting? How is the quality of life in China? Should I move to China?