It is difficult for ordinary people to write with their left hand; It is more difficult to write the reverse word with your left hand; It is even more difficult to write with both hands at the same time, but Wu Jiadong, a 60-year-old man from Hongwei Street in Sanshui, can draw a bow left and right and write down positive and negative couplets, which is called "the home of grassroots couplets" by the neighborhood. The white paper is spread out, and the left and right hands hold pens and dip them in ink. Wu Laohan improvises quickly, and the couplets of positive and negative fonts are completed instantly.