434023。 According to the information of China Post Network, the postcode of the East Campus of Yangtze University is 434023. 43 in the first two places represents the East Campus of Hubei Yangtze University, 4 in the third place represents the postal area of Jingzhou City, 0 in the fourth place represents Jingzhou District, and 23 in the last two places represents the specific delivery office.