The knot button (盘扣), in Chinese, is a distinctive feature of traditional Chinese clothing Eyen today, it is still     1     (high) visible on garments like qi pao—cheongsam. Though normally     2     (associate) with tradition, the knot buttons are currently enjoying renewed popularity.

The history of knot buttons dates back to the prehistoric era, in     3     ropes were firs used as a primitive form of belts. In the 4th century BC, the knot button took     4     (it) present form and remained largely unchanged until the Qing Dynasty. In the second half of the 17th century, jackets and cheongsam of the Manchurian ruling class had     5     wider use of knot buttons.

Knot buttons come in wide     6    (variety) of forms, ranging from plain and simple straight knots to graceful flowery knots. However, generally speaking, the two major groups are distinguished     7     the basis of functions and decorations.

Recent years     8     (see) a comeback of knot buttons in contemporary clothing. Knot buttons of various shapes and sizes,     9     (represent) the creativity of their makers, are being used on different types of garments. The use of Chinese aesthetics(美学)and cultural heritage can attract both Chinese and foreigners who admire the beauty and     10     (unique).

As the world’s longest man-made canal, the Grand Canal is a vast waterway system in the north-eastern and central-eastern plains of China,     1     runs from Beijing in the north to Zhejiang Province in the south.

The Grand Canal (大运河) is one of the greatest hydraulic (与水利系统有关的) projects in human history,     2     (stretch) 1,794 kilometers. Constructed in sections from the 5th century AD onwards, it was built as a unified means of communication for the empire for the first time in the Sui Dynasty. By the 13th century it consisted of more than 2,000 km of artificial waterways, linking five of China’s main river     3     (basin). The canal was     4     important factor for the economy, social     5     (stable) and government functions in ancient China. It also helped the evolution of Chinese culture by enhancing communication     6     the south and the north.

It is widely acknowledged     7     the Grand Canal is precious heritage passed down to us by our ancestors and is flowable culture that should     8     (preserve). China will continue to carry out     9     (integrate) regional development strategies for the Beijing-Tianjin-Hebei region, the Yangtze River Economic Belt, the Yangtze River Delta region, and the Guangdong-Hong Kong-Macao Greater Bay Area and draw up a new national policy for environmental protection and high-quality development in the Yellow River basin. The purpose is     10     (seek) greater cooperation of opening-up among different parts of the country.