FILE PHOTO: The seal of the U.S. Securities and Exchange Commission (SEC) is seen at their headquarters in Washington, D.C., U.S., May 12, 2021. REUTERS/Andrew Kelly/File Photo Reuters By Echo Wang (Reuters) – The U.S. Securities and Exchange Commission (SEC) has started to issue new disclosure requirements to Chinese companies seeking to list in New York as part of a push to boost investor awareness of the risks involved, according to a document reviewed by Reuters and people familiar with the matter. Some Chinese companies have now started to receive detailed instructions from the SEC about greater disclosure of their…