473000。 Official website of Xintian Plaza, Nanyang 360 shows that the postcode of Guo Mao 360, Nanyang is 473000. Nanyang Xintian 360 Plaza is an international full-service city comprehensive shopping center managed by Nanyang Xintian 360 Trading Co., Ltd., a wholly-owned subsidiary of Henan Zhengzhou International Trading Co., Ltd., relying on strong resource advantages, it integrates classic quality into the blood of Xintian 360 Plaza.