I was able to book a domestic flight PVG-CTU on the MU website, one way for two people. It was extremely challenging to get all the fields right on their forms, especially in the payment fields, but eventually it went through. Their price was cheaper than anywhere else I looked.

I also booked a one-way MEL-PVG-PEK on their website successfully. It priced in AUD, and was comparable to what I found elsewhere.

I thought it was particularly funny that at one point in the booking process their seat assignment logo was actually a logo of an airbag exploding on a passenger from the automotive industry.