Two things:
I think the air china website is pretty consistent with chinese beaurocratic websites, but honestly, it is terrible.
Website constantly times out, there is no way to save forms and it feels like a paper form from 1980.
If it wasn't for qantas charging triple…Does anybody know how airline ticket pricing works?
I tried booking tickets at say $1500 after the 3rd try of the website timing out suddenly the price jumps to $1700.
Does it go by time of day or just availibility? Say 100 tickets left, by the time it gets to 95 tickets the price jacks 1.2x for sample.
Qantas is like this too. All airlines sites are terrible. I use Google Flights to search and get prices then book once I know exactly what I want.
Traditionally they have "buckets" of fares for each flight. The first 10 tickets for $=X then the next 10 $=X+50. Then 10 more at $=X+100 and so on. When the fare bucket is sold out they move up to the new more expensive bucket.
If you're seeing a sudden price jump you just got unlucky and the last tickets in that bucket sold to someone else (or system has reserved those tickets for your failed booking) just as you were about to buy them.