I expected this to be a more easy win as well. They are so dominant and can basically decide on their own how a game finishes; if they want, they can win every game with 40+. Maybe they were a bit nervous yesterday and also a bit tired from the last weeks. And the Yi injury played into this too in the end - with him available in the last minutes, they probably would have beaten the -9.5.
In general I don't like to play HC's somehow, because it's not what teams are playing for. They want to win the game and don't care that much, if it's with +1 or +50.
Just so people get an idea, how good Guangdong is: They only played with one import player all the time, although they are allowed to use two. They flew in their second import player MarShon Brooks some weeks ago and have him sitting in a hotel room as a backup since then