The CRH3A type CJ intercity EMU platform is developed. Since the introduction of the SIEMENS CRH3 platform in the original North car Tangshan and the development of the next generation CRH380B series with the long guest of the north bus, the original North car has been hoping to develop a 250 kilometre speed unit on this platform.The model, which was originally developed by the long guest and the Tang car, was originally named CRH3A, of which 3 is still the platform code, and A is the alphabet code for the naming rule of 250 km short marshalling mus. Trial production of two plants The CRH3A new EMU is licensed for design and manufacture. Since then, the CJ1 based on the CJ platform has finally "improved the fruit" and the "correct" model of CRH3A has been restored. At the beginning, the author, like many people, speculated that the CRH3A with a quasi birth certificate would be the same as that of CJ1. In October 2016, however, a new group of new head - type EMU, then CRH3A-5218, went to the rail test from the long guest to expose the new shape of the CRH3A that was produced after a quasi birth certificate. This style is obviously characterized by the golden color block near the driver's window.At the end of 2016 and early 2017, the Railway Group purchased two units of EMUs for 250 times per hour, involving 59 CRH3A units. Among them, at the end of 2016, there were 21 groups of long customers, 31 group of tangche, and 7 orders for long customers in early 2017. Total: 28 groups of long guest, 31 groups of Tang cars. At present, some of the CRH3A which are known to be produced by long customers are allocated to the Chengdu Railway Administration, or in the future. The 5218 vehicle group mentioned in the previous article has been changed to 5230 (for CRH5G upgrade CRH5G-5218 to make way), becoming the first mass production CRH3A. The 23 groups of Tang cars are currently assigned.