Can I go to other countries with a black stamp on my passport?

Why did you accidentally cover it with a black print? Your story is illogical. Why did you go abroad or have a blank passport? Why is there a black stamp when returning to China voluntarily? Just say it. If there are illegal acts or such acts of breaking the country, your chances of getting a visa to Europe, America and other developed countries in the future are very low, because foreign countries attach great importance to credibility, and your bad record can easily be regarded as illegal immigration tendency.