Nickpicking: the CCP foundational congress was held on 23 July 1921, making it 100 years old in a couple of month. The Red Army was founded on 15 July 1927, which is why it is generally assumed (seriously or not, I don't know) that China aims at reuniting with Taiwan before 2027.

But the CCP has been controlling mainland China for a little bit over 70 years, indeed.