Cross-border students are being used as couriers to smuggle electronic items.
Customs officers at Huanggang say they are tracking the racketeers responsible for the smuggling operations.
The customs found five cases of electronic products inside the backpacks of students as they crossed the border during the Easter holidays on April 19.
They included four iPhone 5Ss, four iPads, eight Samsung Galaxy cell phones and 50 gaming CDs.
On April 14, eight cases were discovered within two hours.
A total of 53 cell phones and 12 iPads were found in the backpacks carried by a group of pupils crossing the border.
Customs at Huanggang noticed the pupils' backpacks were either heavily packed or overweight around 4pm, when they were returning home to Shenzhen.
Officers stopped to check the pupils and found a pack of electronic products. More backpacks were checked before 6pm.
More than 30 similar cases were found at the Futian border point this year.
Family members and nannies of some of the pupils admitted certain people worked together to pick up the products, hide them inside the backpacks, and then take them out.
Customs said most pupils involved were around 10 years old and had no idea about smuggling.
The adult smugglers usually lied, tempted and threatened the students to carry the goods for them across the border.
A spokesman for the Huanggang customs said they will track down the smugglers, increase the punishment for using pupils as couriers and carry out operations at irregular intervals.
Meanwhile, customs officers are teaching the cross-border students to protect themselves.
They are also communicating with schools to improve relevant education.
Customs estimate there are more than 15,000 cross-border students, with 7,000 of them crossing via Futian.