My sister in India is trying to get US visitor visa. At start of this year with covid still raging it seemed appropriate that visa appointments were limited. She decided to wait it out. But even now the wait times are 300+ days.

Whereas visitor visa wait time in Beijing is 2 days ?!

Why is there such a discrepancy?
Whereas visitor visa wait time in Beijing is 2 days ?!
Why is there such a discrepancy?