However, exporters that have developed their own innovative brands using advanced technology in the Pearl River Delta, a major manufacturing and trade center in South China, concluded more deals with overseas buyers over the past few months.

Xie Bo, founder and general manager of Radiolink Electronic Ltd, a manufacturer of remote controlled unmanned aerial vehicles, or drones, said the company's capacity was not enough to cater to demand.

"The capacity shortage was due to dramatically increased demand, especially from overseas markets," said Xie.

The company, based in Shenzhen in Guangdong, sold more than 1 million drones in April, according to Xie. "We are not worried about the overseas market as we have developed cutting-edge technology and built up a reputation overseas," said Xie.

According to Xie, the company has developed a long-term strategy to enter the international market by introducing more advanced facilities and equipment in the aeromodeling electronics industry.