Hong Kong tycoon Lee Shau-kee is among four corporate investors who have agreed to pay an aggregate of 646 million HK dollars (80.75 million US dollars) to purchase 25 percent of the total shares being offered by China BlueChemical, China National Offshore Oil Corp’s subsidiary, The Standard reported. In its prospectus, China BlueChemical, the country's dominant fertilizer producer, said it aims to raise at least 2.2 billion HK dollars (282.05 million US dollars) by issuing 1.4 billion H shares, said the paper. UBS said China BlueChemical enjoys an edge over its competitors because its cost of urea is 40 percent lower. UBS did not believe the falling price of fertilizers in the mainland would have a negative impact. "Although the drop in price will undoubtedly drag down gross profit margin, it would not have any significant effect on the company because the margin is currently still at a very high level, which should offset the change," UBS said.