"What's this number?" Yesterday morning, at the Huangjueping Farmer's Market in Jiulongpo District. Ms. Chen, who sells vegetables here, took a poker card of clubs 5, and used her fingers to cover the number 5, letting a little girl guess the number. "Five." The little girl answered immediately. "Wow! You really guessed it!" Ms. Chen exclaimed in surprise. Then she took another card, King, and similarly covered the letter, letting her guess. The girl answered: "K."