The investigation into polycarbonate originating from Taiwan launched by the Ministry of Commerce will be carried out in a fair and just manner, Zhu Fenglian, spokeswoman for the State Council Taiwan Affairs Office, said on Wednesday.

The ministry launched the investigation in November after receiving an anti-dumping investigation application from the mainland polycarbonate industry in October.

The ministry announced its preliminary ruling on Monday, saying there was evidence of dumping of polycarbonate from Taiwan and it would implement temporary anti-dumping measures in the form of security deposits.

Zhu said it is a normal anti-dumping investigation case, the authorities are committed to conducting further investigation in a fair and just manner, and a final decision will be made.

It's hoped the companies involved will cooperate actively and expand their presence in the mainland market through legal means, she said.