This Sept 28, 2018 photo shows the headquarters of the People's Bank of China (PBOC), China's central bank, in Beijing. (PHOTO / VCG)

BEIJING - China's central bank plans to issue 5 billion yuan ($723.42 million) worth of bills in Hong Kong on Sept 20.

These central bank bills will mature in six months, or 182 days, the People's Bank of China said on its website.

The move aims to enrich yuan-investment products with high credit ratings in Hong Kong and improve the yield curve of the yuan in the region, the central bank said.

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Since November 2018, the central bank has gradually established a mechanism for the regular issuance of renminbi central bank bills in Hong Kong.