Correspondence with Chinese officials, British scientists and Leverhulme Trust regarding renewal of exchanges suspended in 1966 Includes list of British scientists willing to visit China, application by K A G Mendelssohn for a visit to China and notes of discussion at a lunch at the Royal Society given for the Chinese Charge d'Affaires. Correspondents include: B.411: Keith Anderson Hope Murray B.412: Keith Anderson Hope Murray B.413: Keith Anderson Hope Murray, Ioan MacKenzie James B.414: Sir Edward Penley Abraham, Sir Michael James Lighthill, Larry Kirwan, Ioan MacKenzie James March - November 1971