Máy bay trực thăng bảo vệ Vạn lý Trường thành
Từ trên không trung, chiếc trực thăng kiểm tra và chụp ảnh đoạn Vạn lý trường thành ở Bắc Kinh, có độ dài 629 km trải dài tới 6 quận, nhằm mục đích bảo vệ di sản văn hóa này.
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