In an Expensive Place to Die (a 1967 movie by Len Deighton) the narrator named Alex who is an American agent is told to leak to the Chinese information about the effectiveness of bioweapon to bolster their deterrent effect, then the narrator met with the Chinese agent Kuang with the American nuclear scientist Hudson in a hotel in southern France.
The unnamed narrator, a British agent, is told to leak to the Chinese information about the effectiveness of nuclear weapons, in order to bolster their deterrent effect. 
