It is more and more strict on inland transportation for toxic cargo. it's almost impossible to get the transportation license cross several provinces. It is resulted that the arsenic trioxide far from loading port is unable to arrive port, the transportation cost increased in huge amount. Since middle of 2018, the supply shortage is very serious, our monthly output is around 400mt, but still unable to meet the requirement shortage, our order is always committed several months earlier. It is expected to resume normal only around the end of 2019.