If I am reading the airport's information correctly, your CA flight should arrive CTU T2 and KL departs CTU T1. These are not the same terminals. Last month I did the opposite, arriving on TG and then a domestic connection on CA. I'll share my experience.

Even though CA said that they have a domestic connection counter for international arrivals it was not open and there was a handwritten sign in Chinese saying proceed to the domestic terminal. If you already have a boarding pass you can take the shuttle bus, otherwise it is a 1 km walk outside between the two terminals, the distances are conveniently signposted. I did not have my connecting boarding pass, just an English printout of the itinerary and did not bother to argue since I wanted to walk some anyway.

While the two terminals seem to be physically connected airside I would not count on being able to access the international terminal airside without a boarding pass. And if you have to claim your luggage and recheck it you don't have a choice.

If you can be sure you arriving at the international terminal, you will be fine. Otherwise be prepared to grab a cart and keep moving as you will have ground to cover. You may want to check with KL for their check-in hard cut-off time, you should be OK if it is 60 minutes. If it is 90 minutes you will be cutting it close if you have any kind of delay out of PVG.