In the north of china,there lies a 6,700-kilometer-long(4,161-mile-long) ancient wall. now well-known as the great wall of china ,is starts at the jiayuguan pass of gansu province in the west and ends at the shanhaiguan pass pf hebei ……
In the north of china,there lies a 6,700-kilometer-long(4,161-mile-long) ancient wall. now well-known as the great wall of china ,is starts at the jiayuguan pass of gansu province in the west and ends at the shanhaiguan pass pf hebei ……