The web search results mention the 'lamp post climbing challenge' and the general theme of viral stunts, but none of the provided search results independently confirm that this specific challenge (cross-legged, needing rescue) has gone viral in China. The evidence is suggestive but not corroborated by multiple independent sources.

The web search results contain general information about viral videos and police warnings regarding stunts, but no single source corroborates the specific claim that police warned about this 'pole scaling craze' requiring delivery riders, families, and passersby to save people.

One web search result mentions a woman surnamed Yang from Jiangsu province, but no source links this specific individual (Song) to having attempted the challenge while out for an after-dinner walk. The evidence is too disparate to corroborate the full claim.

The web search results discuss sitting cross-legged and lamp posts in general contexts (body language, physics problems) but do not provide evidence describing the specific challenge mechanics: sitting with legs crossed *around* a lamp post and attempting self-release.

The web search results discuss difficulty in maintaining positions (e.g., on waterslides) or general challenges, but none specifically address the difficulty of uncrossing legs after participating in this particular lamp post challenge.

The web search results mention food delivery jobs (Zomato) and passersby/people in photos, but no single source corroborates the specific narrative that participants in *this* challenge required help from all these groups (families, riders, police) to escape.