Is the line drawn by a thousand miles of marriage a line segment or a straight line?

Line segment A straight line has no end and no infinity. If you understand the original meaning of a straight line, it becomes impossible.

The marriage of thousands of miles is a story in the Tang Dynasty, which was handed down by later generations as a symbol of fate, saying that the marriage between husband and wife was predestined, and the old man secretly formed it with a red line under the moon.

Language: Cao Qingxue Qin's "Dream of Red Mansions" 57th time: "Since ancient times, there have been old people under the moon, who are in charge of thousands of miles of marriage. It is destined that he only uses a red line to trip the feet of these two people. "