A Chinese yixing teapot, attributed to Wang Yinxian (1943 - ), incised Mao's famous verse 'serve the people' on one side, and landscape on the other, one seal of the artist to the interior of the lid, and one seal of the artist to the base, accompanied with the signature of both the artist and Gu Jingzhou, together with a rubber-stamped verse '1968 Against Selfishness and Marxist revisionism', spout to handle: 18 cm, body: 11 cm diam