Foreigners have been picking up garbage on the Great Wall for 23 years, only because they have longed for the Great Wall since childhood, climbing the Great Wall and finding that there is still garbage everywhere by tourists, feeling heartbroken, and founding the International Great Wall Association

Foreigners have been picking up garbage on the Great Wall for 23 years, only because they have been yearning for the Great Wall since childhood, climbing the Great Wall and finding that there is still garbage everywhere for tourists, feeling heartbroken, founded the International Great Wall Association, regardless of pay, do not ask for returns, known as the "Great Wall Scavenger". He was William Lindsay from England.