In 2025, the Diamond Industry Development Conference signed contracts for 30 projects across the entire industry chain.

The 2025 Diamond Industry Development Conference opened in Zhengzhou on the 6th, with a total of 30 projects signed on site covering the entire industry chain, with a total investment of no less than 15 billion yuan. Mayor Zhuang Jianqiu of Zhengzhou city said in his speech that currently there are 122 companies in the diamond industry chain in Zhengzhou city, with an industry scale exceeding 15 billion yuan. Public data shows that in 2024, China contributed over 75% of the global diamond cultivation output, with Zhengzhou city accounting for about 30% of the total national output.