Along with the woman, police also nabbed two male drug dealers.
On March 21, 2015, police spotted a suspicious vehicle passing a toll gate in Fangchenggang City.
After a search, they seized a yellow metal box hidden on a baby of less than a year.
The box contained two bags with 125.2 grams of methamphetamine.
They also found more than 300 grams other drugs from elsewhere inside the car, including methamphetamine and barbitone.
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According to proceedings at the Intermediate People's Court of Fangchenggang, Liang, the woman, was a drug user.
Huang, the driver, was sentenced to a prison term of ten years by the court and a fine of 10,000 yuan.
Tang, another man in the car, was also convicted of drug trafficking, sentenced to seven years in prison and fined 8,000 yuan.