Generally, there is no reason for the naming of warships. Only some special ships have reasons, such as the "Zhenghe" ship (81st ship), "Shichang" ship (82nd ship), and "Hua Luogeng" No. 8 weapons test ship (ship 892) are all commemorative. The names of Chinese Navy ships are not repeated, so you don’t have to worry. Sooner or later there will be a warship named Yan’an. Let me explain why the 136th ship is the Hangzhou ship.
First of all, the Hangzhou ship is a destroyer. According to the naming regulations, the names of major large and medium-sized cities should be used; secondly, the Hangzhou ship also belongs to the East China Sea Fleet. The East China Sea Fleet uses seven provinces and cities in East China (Shanghai, Jiangsu, Zhejiang, and Anhui). , Fujian, Jiangxi, Hubei) and the Xinjiang Uygur Autonomous Region, so it is inappropriate to use Yan'an; thirdly, the naming of ships such as destroyers and frigates is decided by the Naval Command, and they should establish a certain naming sequence. It's probably Hangzhou's turn.