I tend to assume business will be three times the cost of economy; I suspect SFO to Shanghai is a weird route from a price perspective, much like London to NYC; very few landing spots available. I'd also consider Jan 21-Feb 3 to be pretty last minute.

AMS-IAD (two airports with good capacity) for the default Google Flight dates show 45k for economy, 99k for PE, and 120k (all INR) for business, all on reasonable airlines

    > What normal human 

One that's a True Scotsman only, I'd guess.