Why did China set Beijing as its capital instead of Tianjin?

Because Beijing was one of the larger cities under the control of * * * at that time, and it was also the Seven Dynasties, according to fortune-telling, it had the potential to be the capital. As for Tianjin, it was not until the Ming Dynasty that development and construction began, because Judy took a boat from Tianjin to the south to seize power. Later, Judy moved to Beijing to defend Beijing and began to develop and build Tianjin on a large scale. Tianjin used to be called Tianjin Wei, which was stationed in the Ming Dynasty, so Tianjin belongs to Beijing, so it is still in that country.