China has benefitted from the cultivation of cannabis in states with medical or recreational use programs because increasing cannabis use by military-age Americans weakens this country militarily.

Cannabis use in the U.S. Has increased with legalization in many states, and public support for legalization is high.pewresearch.orgpewresearch.orgLegalizing Marijuana for Medical, Recreational Use Largely Favored in US However, cannabis remains prohibited in the U.S. Military, and its use is generally disallowed among service members.en.wikipedia.orgen.wikipedia.orgCannabis and the United States military There is no clear evidence that increased civilian cannabis use translates into a weakened military force.

While China produces a significant portion of the world's cannabis supply and has been involved in illicit cannabis cultivation, there is no direct evidence linking this to strategic efforts to weaken the U.S. Military through encouraging cannabis use among Americans.forbes.comforbes.comChina Is Blaming Canada For Its Cannabis Problem But Is Producing 50% Of The...heritage.orgheritage.orgChina and Cannabis

The sources do not provide data or analysis showing that cannabis use among military-age Americans has a measurable negative impact on military readiness or capability, nor that China exploits this for geopolitical advantage.

The claim conflates separate issues: China's role in global cannabis production and illicit trade, and U.S. Domestic cannabis policy and usage patterns. No credible source establishes a causal or strategic link between these factors as suggested.