According to the Wall Street Journal, US AI company executives sent a joint letter urging Congress to pass legislation requiring screening of purchasers of synthetic DNA and RNA.

Colombia's Cerrejon coal mine has resumed operations and its force majeure declaration has been lifted, a statement said.

On June 4 total turnover on the Shanghai and Shenzhen exchanges was CNY 2.758 trillion, down CNY 372.6 billion from the prior session. Shanghai turnover was CNY 1.275 trillion (volume 621 million lots) versus CNY 1.430 trillion previously; Shenzhen turnover was CNY 1.483 trillion (volume 719 million lots) versus CNY 1.701 trillion previously. GigaDevice led single-stock turnover at CNY 29.30 billion, followed by InnoLight Technology CNY 27.60 billion, Hengtong Optic‑Electric CNY 25.73 billion, FOXCONN INDUSTRIAL CNY 22.12 billion and BOE Technology Group (BOE A) CNY 19.95 billion.