No, it's not suitable. Merkel's tenure in not restricted by law, mostly because chancellor is appointed by majority party/coalition in the parliament. Every election cycle there's a very real chance CDU alliance and CDU appointed chancellor would have to go. In fact, it's a certainty Merkel isn't going to hold this post for life and then pass it down in her family.

While in China, there's a 22nd amendment inspired safeguard in the constitution, specifically to prevent another Mao-like figure from coming to power. The safeguard is being removed specifically for Xi: you can't seriously argue he's irreplaceable across the population of 1.7 billion. The country turns from being run by an authoritarian committee to a personal dictatorship.

And thus begins the decline of China.