Question:
Who was the head of state of People's Republic of China in Aug, 1975?

Context:
 Dong Biwu is the head of the state of People's Republic of China from Oct, 1968 to Jan, 1975. 
 Xi Jinping is the head of the state of People's Republic of China from Mar, 2013 to Dec, 2022. 
 Liu Shaoqi is the head of the state of People's Republic of China from Apr, 1959 to Oct, 1968. 
 Yang Shangkun is the head of the state of People's Republic of China from Apr, 1988 to Mar, 1993. 
 Zhu De is the head of the state of People's Republic of China from Jan, 1975 to Jul, 1976. 
 Ye Jianying is the head of the state of People's Republic of China from Mar, 1978 to Jun, 1983. 
 Soong Ching-ling is the head of the state of People's Republic of China from Oct, 1968 to Jan, 1975. 
 Jiang Zemin is the head of the state of People's Republic of China from Mar, 1993 to Mar, 2003. 
 Hu Jintao is the head of the state of People's Republic of China from Mar, 2003 to Mar, 2013. 
 Mao Zedong is the head of the state of People's Republic of China from Oct, 1949 to Apr, 1959. 
 Li Xiannian is the head of the state of People's Republic of China from Jun, 1983 to Apr, 1988.

Answer:
Zhu De