x means transit without stopover
// means open-jaw or surface segment (in your example own travel between YYZ and ORD - this could be by land, or could be a separate ticket)
CCPSTAR1 is fare code for business class circle pacific *A distance zone 1.
I'm guessing the (WUH-HKG) means HKG-WUH-HKG is on a separate ticket rather than included in the circle pacific ticket. But you could find out by PM/emailing the author of that trip report.