China has become the world's largest baby formula milk powder market, because many Chinese parents have had low confidence in its own domestic brands since 2008.
About 80 percent of imported dairy products were from New Zealand in 2012, Wang added.
Chen Zhuolin, the mother of a 15-month-old girl, said: "I'll never allow my baby girl to have domestic milk powder, even though I pay a lot more for imported baby formula."
She said that she was going to Hong Kong every month to buy baby formula.
Some regions, including Hong Kong, have just issued amount restrictions on purchasing milk powder, as a result of many parents doing the same.
H.K. limits visitors' buying of infant formula