Wow, just checked the same flights I booked two weeks ago (CTU-SHA-PVG-CTU) and I see the same as you - no Air China flights are showing.

I'm wondering if there is a big issue there; I redeemed my flights on Nov 5th, and noticed that 6 days later they had disappeared, and weren't even in the "Your Rewards" section.

When I called in, I was told that somehow all my Air China segments has disappeared and it was an empty unticketed PNR... although it still existed as a valid empty PNR. They had to manually re-add each segment, and re-sent it to ticketing.

Thankfully it does show as ticketed, now!