Watershed? What do you mean, it's smooth after crossing it?

It means the dividing line of life and the turning point of life. According to the query watershed, we can know the relevant information. The watershed means the dividing line of life, and the turning point of life means that it will be smooth sailing after it. Watershed refers to the mountains or highlands that separate two adjacent river basins, and it is also a metaphor for the main boundary between different things.