Mr. Cai Hesen is a CCP martyr who sacrified his life at only 36 during the early stage of revolution.  He used to be classmate with Chairman Mao, being good friends and comrades to each other.  It is worth your while to know him at:      

蔡和森：36岁四肢被钉在墙上牺牲，本是和毛泽东齐名的“凤雏”|向警予|周恩看_网易订阅 (163.com)

Please also refer to my previous posting about his ex-wife, who is also a martyr died of revolution even before him.

向警予 - kkuo0810的部落格 - udn部落格