Alibaba Group Holding Ltd. pledged to invest more than 380 billion yuan ($53 billion) on AI infrastructure such as data centers over the next three years, a major commitment that underscores the e-commerce pioneer’s ambitions of becoming a leader in artificial intelligence.

U.S.-listed shares of Alibaba Group are falling 3% in premarket trading Monday after the Chinese tech giant announced plans to invest more than $52 billion in artificial intelligence and cloud infrastructure over the next three years.

The Chinese technology giant first mentioned the plan last week when it reported results but didn’t provide a specific figure.