At 1:47 in the morning, I stared at the dense forms on the computer screen, and my eyes were almost bloodshot. I was the only one left in the office, the air conditioner had been turned off long ago, and the stuffy air was filled with the smell of printer and instant coffee. I took the last sip of the cold coffee, and the coffee grounds at the bottom of the glass stuck to my tongue, as bitter as chewing Chinese medicine.