What exactly is the Tianhe mentioned by the ancients? Is it a modern sea?

? I don't think the Tianhe mentioned by the ancients refers to the sea. The ancients often said that a round place doesn't mean a round place. It is a philosophical thought of the ancients, and the cycle of heaven, such as water vapor into clouds, clouds into rain, and water vapor behind the rain, is like a cycle; Place means that the creatures on the ground do their jobs, do not cross the border, and are square. You can look at Lu's Spring and Autumn Annals, which has an explanation. Then Tianhe certainly refers to some ideas, not just the sea.

We have all seen The Journey to the West. Pig Bajie is Marshal Tian Peng in charge of Tianhe, and the Dragon King is in the East China Sea, one in the sky and the other on the ground. The dragon king said that in our sea, the precious iron at the bottom of Tianhe River has been sunny and full of energy these days. Dare you show up to meet this saint? A precious piece of iron at the bottom of Tianhe River: the golden hoop is in the East China Sea, so Tianhe here refers to the East China Sea. This statement is just a compilation of novels.

Then there is our Qixi Qiaoqi Festival, which is the day when Cowherd and Weaver Girl meet. It can also be said that Tianhe is the Milky Way in the sky, and our ancient astronomers have already surveyed the world of the universe. The wisdom of the ancients is not only embodied in humanities and social sciences, but also in algorithmic science. The Yellow River was called "river" and "river water" in ancient times. Due to the increase of sediment concentration in Han Dynasty, names such as "turbid river" and "Yellow River" began to appear, and the names of the Yellow River were widely used after Tang and Song Dynasties.

? It can be seen that the ancients did not think it was a modern sea. No matter whether the word Tianhe was mentioned in ancient poetry, it was a long time ago, and then productivity developed, so there was no such cognition. Tianhe has been repeatedly defined and has many meanings.