What is the postcode of Puyang, Henan Province?

Puyang City, Henan Province, formerly known as Diqiu and Kaizhou, is a prefecture-level city under the jurisdiction of Henan Province. Located in the northeast of Henan Province, at the junction of Hebei, Shandong and Henan provinces in the lower reaches of the Yellow River, it faces Jining City and Heze City in Shandong Province across the river in the east and south, and adjoins Liaocheng City and Tai 'an City in Shandong Province in the northeast.