The US and South Korea on Friday announced their decision to deploy the Terminal High Altitude Area Defense (THAAD) missile system on the Korean Peninsula.

Apart from monitoring missiles from North Korea, THAAD could expand South Korea's surveillance range to China and Russia and pose serious threat to the two countries.

Though South Korea claims it can reduce the surveillance range, the country cannot make the call as the system will be controlled by US forces in South Korea, and such cheap promises mean nothing in international politics.

We recommend China to take the following countermeasures.

China should cut off economic ties with companies involved with the system and ban their products from entering the Chinese market.

It could also implement sanctions on politicians who advocated the deployment, ban their entry into China as well as their family business.

In addition, the Chinese military could come up with a solution that minimizes the threat posed by the system, such as technical disturbances and targeting missiles toward the THAAD system.

Meanwhile, China should also re-evaluate the long-term impact in Northeast Asia of the sanctions on North Korea, concerning the link between the sanctions and the imbalance after the THAAD system is deployed.

China can also consider the possibility of joint actions with Russia with countermeasures.

The deployment of THAAD will surely have a long-term and significant influence. South Korea will be further tied by its alliance with the US and lose more independence in national strategy.

North Korea's nuclear issue has further complicated the situation on the Korean Peninsula, but the country's possession of nuclear weapons also results from outside factors.

The biggest problem of the peninsula's messy situation lies in US' Cold-War strategy in Northeast Asia, and its mind-set of balancing China in the region. Neither Pyongyang nor Seoul could make their own decisions independently, as the region's stability and development are highly related to China and the US.

The whole picture of the situation on the Korean Peninsula could not been seen merely from the view of Pyongyang and Seoul. China's relationship with North Korea has already been affected, and ties with South Korea are unlikely to remain untouched.

China is experiencing the pains of growing up. We have to accept the status quo of "being caught in the middle."

China should neither be too harsh on itself, nor be self-indulgent. Being true to itself, China will fear no challenges.