I don't see Pang and Tong listed for Skate Canada. They had to withdraw from Skate America because Qing Pang was ill with pyelitis (kidney infection). Their next scheduled Grand Prix event is the China Cup (along with Shen and Zhou).
Zhang, the girl, also was sick with something from what the announcer at CCTV said. The announcer is one of the coaches working with Yao, a former ice dancer I believe. She said Zhang Dan is fine now.