First built at the turn (later 13th century) between the Song and Yuan dynasties, the Ancient Town of Lijiang is located in Lijiang Naxi Autonomous County in southwest China's Yunnan Province. Streets in it are built along the mountains and rivers and __________ with red breccia stones to prevent __________ surfaces in the rainy season and __________ in the dry season. Patterns on the stones are natural and elegant and perfectly match with the whole __________ environment. __________ at the Center of the Ancient Town is a typical example of ancient streets in Lijiang. With a long history, the Ancient Town of Lijiang features primitive __________, naturalness and a wonderful urban mosaic of mountainous city scenery and water town style. Folk __________ in Lijiang __________ the finest traditions of Han, Bai, Yi and Tibetan nationalities and bear the unique style of Naxi people, forming a rare legacy for the study of Chinese architectural and cultural histories. The Ancient Town of Lijiang contains rich traditional national culture, __________ the __________ and development of Naxi ethic people and offers an important historical source of materials for the study of cultural development of mankind.