(Bloomberg) – China plans to tighten controls on overseas sales of shares by domestic companies and ban those whose listing could pose a threat to national security. Bloomberg’s Most Read All Chinese companies seeking initial public offerings and additional overseas share sales should register with the China Securities Regulatory Commission, according to a consultation paper it released on Friday evening. . Under the proposals, companies whose overseas listings could threaten national security are banned from selling shares, and companies whose operations raise cybersecurity concerns would go through security reviews. Improving supervision of listed companies abroad comes against the backdrop of…