Well now a tricky one! "69cuan" doesn't seem like a common term in any popular tongue I am familiar with.
It could be a jargon specific to a certain industry, or perhaps it's a neologism. If you could provide some information about where you saw this term, I could try to shed some light. It could be Perhaps could change to rain tomorrow. In case decide to venture out the outdoors, take with you some sunscreen. Slang Word Every online community