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After Jiang Ning heard this, he waved his hand and said without hesitation, "I can't answer your question."

Dong Hao was overjoyed. He didn't expect Jiang Ning to be unable to answer such a small question. He also revealed an 'as expected' expression on his face.

He looked around at the people who were listening to his lecture, shook his head, and said, "I've told you before