was baffled, she didn't understand why Ou Yan suddenly hung up the phone. When she called back, no one answered."Sasha, what's going on Yanyan's voice sounds a bit unhappy.""Between you and Acheng...... be any clues on the surface"There was a news story before, I don't know if you guys have seen it, there was a calligrapher who could write with a brush in 3 millimeters of characters. The calligraphy...