Joke Collection Website - Bulletin headlines - Who can tell me the meaning of "Tianjin Wei"?

Who can tell me the meaning of "Tianjin Wei"?

The development history of Tianjin can be traced back to the pre-Qin period, and the geographical concept of "Tianjin" came into being in the Ming Dynasty. At that time, Emperor Zhu Di moved south from Jidu to relocate the capital to Beijing. He passed through the mouth of the Sanhe River several times. Considering that an unprotected seaside would be like a house without a door, and foreign Japanese pirates would endanger the country, he transferred the Huai army to guard it. (Historical data are available for the troop deployment and defense situation.) Because it was the emperor's crossing, it was named Tianjin to expand the stronghold and increase defense. Guards were set up according to the military structure of the Ming Dynasty. The number of guards is 5,600, which seems to be too few to guard the gates of the capital. Later it was merged into Tianjin Zuowei and Tianjin Youwei, making Tianjin Wei the largest defender in the country.