H4160, China Prison Ration Coupon (Banknote), One Yuan, 1970.
XF, please refer the picture.
The face value is 1 Yuan. This coupon was sepcially issued for prisons by Gui-Zhou Province in 1970, a large province in the South-West part of China.
As far as I know, Guizhou Province is the only province which issued prisons ration coupons. The 1963 issue and 1970 issues can be found today.