1) The Great Wall of China is not visible from space without aid, contrary to popular belief.

2) The smallest unit of time is known as a zeptosecond, which is equal to one trillionth of one billionth of a second.

3) The highest-grossing film of all time is "Avengers: Endgame," which has earned over $2.79 billion at the global box office.

4) Tea, originating from China, is one of the most consumed beverages globally. It is made from the leaves of the Camellia sinensis plant and comes in various types, including green, black, oolong, and white tea. Each type undergoes different processing methods, resulting in distinct flavors and aromas. Tea culture has a rich history and is celebrated in rituals, ceremonies, and social gatherings in different cultures worldwide.