All stainless steel box, moisture-proof and anticorrosive, currently only in China, the highest cost.

In February 2005, guangxi beihai port project was expanded, 6 sets of portable bulk cargo filling machine and overhead bucket were needed to be purchased. In September 2004, beihai port inspected the main domestic manufacturers. Due to the humid and rainy climate, it brought great difficulties to the packaging, especially for such materials as sulfur, red potassium and white potassium. Eventually I plant 4.89 million yuan won the bid.