603389，上演“天地板”

Group 1 - The company *ST Yazhen experienced a limit-down situation during the morning session on September 23, indicating significant selling pressure [1] - The stock exhibited a "Tian Di Ban" phenomenon, which refers to a situation where the stock price hits both the upper and lower limits within the same trading day [1] - The trading volume for the day reached 160 million yuan, reflecting heightened market activity and investor interest [1]