Answer:
2021. As of that time, the Great Wall of China is a UNESCO World Heritage site and is one of the most visited tourist attractions in China. Many sections of the wall have been restored and are in good condition, while others have deteriorated due to natural erosion and human activities. The Chinese government has invested in restoration and preservation efforts in recent years to ensure the longevity of the Great Wall. However, some sections of the wall remain in a state of disrepair and are at risk of further deterioration.
Step-by-step explanation: