Wang Layuan, director of the White Duck Factory, pioneered the lead-free cleaning process of preserved eggs, which completely changed the history of people making preserved eggs with lead-containing accessories. As one of the eight treasures of Huangshi, Songhua eggs have long been included in the must-have items for locals to visit relatives and friends. As early as 1984, the "White Duck" Songhua Egg won the Silver Award for National Quality Products. In 2011, "White Duck" was rated as a Chinese time-honored brand, becoming the only Chinese time-honored brand in China's preserved eggs. The egg yolk of the white duck pine egg is dark green, there is a sugar-like sauce soft heart, people who love to eat will feel soft and smooth, the price is about 3 yuan a piece, but the purchase channels are not wide enough.