FIFA, April 19 (Xinhua)-- shares of USI fell by the daily limit on the afternoon of the 19th, with a turnover of more than 5 billion yuan. The share price just hit its highest level since the first week of trading last day. The reporter called USI as an investor, and the staff of the company's securities department said: the stock price trend is the fluctuation of the market, and everything is normal in the company's internal production and operation. (Yi Cai)