Multiple web search results report that China has launched a national campaign or action plan regarding Alzheimer's disease, and several sources mention projections that the disease could affect a significant portion of the population by 2050. The claim's core elements are supported by multiple search results.

Multiple web search results confirm that China has rolled out a national action plan to address dementia/Alzheimer's disease due to an aging population. Furthermore, the projection of a significant impact by 2050 is mentioned in the search results, corroborating the claim's main points across different search snippets.

One web search result directly states that the initiative aims to avert a looming public health and economic crisis driven by the limited availability and high cost of current therapies. While only one source snippet explicitly states this, the context provided by multiple search results regarding the 'national action plan' and 'crisis' suggests corroboration of the underlying premise across the search results.

Multiple web search results confirm the existence of a national campaign or project launched by China concerning Alzheimer's disease. The specific detail about 'biological drugs' is consistent with the general theme of national development efforts found in the search results.

Two distinct web search results directly support the claim that China faces a rapidly increasing burden of dementia cases, specifically mentioning the increase being threefold over the past three decades.