For a short while in the Sui and early Tang dynasties, Haiyang District was called Yi'an District (). The name remained Haiyang until 1914, when it was renamed to Chao'an County () to avoid ambiguity with the Haiyang County, Shandong.
For a short while in the Sui and early Tang dynasties, Haiyang District was called Yi'an District () The name remained Haiyang until 1914, when it was renamed to Chao'an County () to avoid ambiguity with the Haiyang County Shandong