As controversy over the deployment of the THAAD missile defense system in South Korea continues, Japan is now considering its own deployment of the system. China's Foreign Ministry has expressed concern.

"China has a clear stance on the deployment of THAAD and that stance has not changed. For historical reasons, the military and security direction taken by Japan is scrunitized by its neighbors and the international community. We hope Japan will consider this decision carefully, and play a constructive role in promoting  regional peace and stability rather than a negative one," said Geng Shuang, spokesperson of Chinese Foreign Ministry.

The ministry also urged Singapore to strictly adhere to the one-China policy after nine Singaporean armored vehicles, reportedly used in military drills in Taiwan, were seized by Hong Kong customs last week.

"The Chinese government strongly opposes any official interactions between the Taiwan region and any country that has established diplomatic relations with China, including military exchanges and cooperation," said Geng.