Dear Mr. Zang,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located one series China and Taiwan Subject Files, 1948 - 1961 in the Records of U.S. Foreign Assistance Agencies (Record Group 469) that contains information you seek in a file unit Programs -- George St. Louis China Mission. The records are not yet digitized and available in the Catalog. For access to and/or copies, please contact the National Archives at College Park - Textual Reference (RDT2) via email at email@example.com.
We suggest that you request a copy of George St. Louis' Official Personnel File (OPF). OPFs and medical information for individuals who worked for the U.S. government in a civilian capacity prior to 1952 are in the custody of the National Archives at St. Louis P.O. Box 38757, St. Louis, MO 63138. Please include the full name used during Federal employment, date of birth, Social Security Number (if applicable), name and location of employing Federal agency, beginning and ending dates of Federal Service. For more information, the web site is https://www.archives.gov/st- louis/archival-programs/civilian-personnel-archival/index.html.
We hope this is helpful. Best of luck with your research!
George W. St. Louis also shows up in many of the Foreign service lists for the time period. For example, in 1953 he is chief program officer on the mission staff of the Mutual Security Agency in Taipei.
He also shows up in some of the volumes of the Foreign Relations of the United States. For example, see his listing in the index for Foreign Relations of the United States, 1949, The Far East: China, Volume IX.