On May 1 1 2004, the European Space Agency released a photo of Zhang Weixing, saying that the winding "line" in the upper right corner of the photo is a section of the Great Wall in the northeast of Beijing. 19, the European space agency issued a correction: "That's not the Great Wall, it's a river." On the 26th, Beijing surveying and mapping experts announced that the European Space Agency's interpretation of photos was wrong again. It's not a river, but a mountain road. The education department of China has moved the corrected contents into textbooks. No astronaut has ever said anything about it.