From 1997 to 1999, China cracked 548 cases of illegal buying, selling and smuggling of precursor chemicals and confiscated more than 1,000 tons of illegal chemical products.

• 1997年至1999年，全国共破获非法买卖和走私易制毒化学品案件548起，缴获各类易制毒化学品1000多吨。