Collapse in Ancient Times with Professor Poisonous Tongue

When the two of them were inspecting an unexcavated ancient tomb from the Tang Dynasty, the male protagonist was talking and complaining about the mistakes on the epitaph, while the female protagonist silently recorded it. The male protagonist stepped on the air and subconsciously grabbed the female protagonist. They both fell into the main tomb chamber and happened to be pressed against the mysterious bronze coffin - they traveled through time.