It's in quotes because the actual English initialism is CPC.
Using "CCP" shows your ideological bias.
You say that like CPC doesn't carry an ideological implication of its own. To the average person, the distinction between calling it the Chinese Communist Party and the Communist Party of China is so miniscule that they're not going to seriously engage with you if you earnestly try and take that angle. Go ahead and nitpick over how people refer to the party at your ideology's expense. I sure as shit won't stop you.
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