This is turning into the NH deal that was alive 2 year ago haha!
2 years ago, NH had: LAX-SIN/CGK/BKK-YVR/YYZ/YYC for sub 400, I cannot find that thread now, but it has been half-alive ever since. So I and my family did LAX-BKK, SHA-HND-YVR for 340USD each. However, later I did some research, SEA is also possible for NH but also this UA deal a few months ago. SEA-SFO-HKG-HGH, SHA-HND-SFO-YVR. I personally took one last year: SAN-SFO-HKG-HGH, PVG-HND-YVR.
Here I include one that is modified from what shek3112 put down, and remember: GF is really wonky with this deal. If you see UA being 3k+ when you first search, do not fret, click on it and then when it realized the deal can be combined with KA flights, the price renews to sub 600 usually.
https://goo.gl/flights/iyyS8
I used SHA because I personally hate using PVG for morning flights: 70+USD for taxi from my house!
and I personally think the NH deal is a different thing. Both of these deals have been around for years.
https://goo.gl/flights/gspfS
this is LAX-CGK, PEK-YYZ for 406.