Hong Kong's chief executive said on Tuesday that customs officers will learn from an incident in which they pressed unnecessary charges against a woman from the Chinese mainland who tried to take four cans of milk-flavored rice powder and two tins of infant milk powder over the border.

Customs authorities in Hong Kong admitted on Monday that they pressed unnecessary charges against the woman because they had misunderstood a newly enforced limit on the amount of baby formula allowed to be taken into the mainland.

Chief Executive Leung Chun-ying said officers will learn from the incident and avoid mistakes in the future. He made the comments to media in Tianjin as he met with officials there.

The wrongly-accused woman, 29-year-old Huang Xuejiao from Nanjing, Jiangsu province, was shocked to learn the chief executive had responded to her case.

"I only wanted to share my experience so that other people could avoid the hassle," Huang said.

Huang was stopped by Hong Kong customs officers on Friday with two tins of infant milk powder and four tins of milk-flavored rice powder.

Officers confiscated the six tins, thinking they were all infant-powder products regulated by a new limit. This allows people aged 16 and older to leave Hong Kong with a maximum of 1.8 kg, or roughly two tins, of such products within 24 hours. The new regulation took effect on March 1.

Huang said she knew about the new regulation, but felt it was safe to carry the six tins. This was because she had asked a customs officer when entering Hong Kong and was told that carrying milk-flavored rice powder across the border did not violate the limit on baby formula.

However, she could not present a recording of the conversation as proof. She was allowed to leave after posting bail of HK$1,000 ($130). She was told to report on April 16 to the police station in Lok Ma Chau, which borders the mainland city of Shenzhen, and to appear in court on April 18. Huang felt she had been wronged and shared her experience on her micro blog on Saturday, triggering widespread media attention.

On Monday evening, several media organizations on the mainland received a statement from Hong Kong customs, stating that officers made their initial response because the infant powder and milk-flavored rice powder had similar packages and were both for consumption by infants aged six months and above.

But they later realized that milk-flavored rice powder is not governed by the regulation on infant formula, the statement said.

Huang said: "So far, I have not received any notice from Hong Kong customs, and I am still confused about what to do next. I hope they will drop the case and I no longer need to appear in court."