[northbound funds bought 4.085 billion yuan net today, Tianqi lithium industry bought 732 million yuan net] Finance Union, May 15, northbound funds bought a net 4.085 billion yuan today. Tianqi Lithium Industry, China Micro Corporation and Agricultural Bank of China received a net purchase of 732 million yuan, 404 million yuan and 301 million yuan respectively. Ping an of China ranks first in net sales, with a value of 569 million yuan.