The Chinese government had talks about possibly financing the world's most ambitious investment project, SoftBank's $100 billion bet on the future of technology known as the Vision Fund.

China's largest sovereign wealth fund, the China Investment Corporation, last year spoke with the Vision Fund about making an investment, according to five people with knowledge of or briefed on the conversations. A contribution from CIC, which has $800 billion to invest, would have been very politically controversial, but it would also supply the Vision Fund, led by CEO Masayoshi Son, with a steady spring of capital for future versions of SoftBank's project.