in commemoration of the 70th anniversary of the world's first computer eniac in commemoration of the 20th anniversary of the Fourth World Conference on Women Commemoration of the 75th anniversary of the Convention of Paris essays in commemoration of the 140th anniversary of the birth of master Hong Yi 并列题名：Commemoration of the 75th anniversary of the Convention of Paris a commemoration of the 25th anniversary of the UN Fourth World Conference on Women in commemoration of the 120th anniversary of Ma Lianliang's birth in commemoration of the ten anniversary of Shostakovich's death in commemoration of the 110th anniversary of issuance of large dragon stamps commemorating the 30th anniversary of reform and opening-up