(1) According to the pictures and the knowledge learned, this is the Grand Canal of the Sui Dynasty. Since 605, Yang Di has recruited millions of people and opened a Grand Canal with Luoyang as the center, Zhuo Jun in the north and Yuhang in the south, running through more than 2,000 kilometers from north to south.

(2) The Grand Canal in the Sui Dynasty reached Zhuo Jun (now Beijing) in the north and Yuhang (now Hangzhou) in the south.

(3) The Grand Canal in Sui Dynasty was divided into four sections from north to south: Yongji Canal, Tongji Canal, Hanjiang River and Jiangnan. The Grand Canal starts from Luoyang and may pass through Tongji Canal, Hanjiang River and Jiangnan.

(4) The Grand Canal in Sui Dynasty was dug by Yang Di in 605, with a total length of more than 2,000 kilometers. The opening of the Grand Canal has promoted the economic and cultural exchanges between the north and the south, and it is an artery running through the north and south.

So the answer is:

(1) Sui Grand Canal or Beijing-Hangzhou Grand Canal; Luoyang.

(2) Beijing and Hangzhou.

(3) Tongji Canal, Hangou and Jiangnan River.

(4) It has promoted economic and cultural exchanges between the North and the South, played a role in connecting the North and the South, and promoted the development of towns and industries in coastal areas.