Cross the river by feeling for stones under one's feet.

Black cat or white cat: If it can catch mice, it's a good cat

Black cat, white cat, what does it matter as long as the cat catches mice?

In China, we intend to acquire advanced technology, science and management skills to serve our socialist production. And these things as such have no class character.

Chairman Mao's greatest contribution was that he applied the principles of Marxism-Leninism to the concrete practice of the Chinese revolution, pointing the way to victory. It should be said that before the sixties or the late fifties many of his ideas brought us victories, and the fundamental principles he advanced were quite correct.

Seek truth from facts.

Whatever sentence is passed on the Gang of Four won't be excessive. They brought harm to millions upon millions of people.