A: Recently, the price of zinc sulfate is not very stable, because

1/ It float according to the international metal zinc;

2/ The price of raw material rose sharply such as coal, oil and electricity price;

3/ Currency inflation is very serious in China, the exchange rate between US Dollars and CNY broke 6.4.

4/ September and October is purchasing peak time, and supply is very tight.

5/ Others such as labor shortage, increasing labor cost and so on.