After two-and-a-half months of relative peace, North Korea finally launched its most powerful weapon early this Wednesday.

Pyongyang confirmed the launch, saying it had successful fired a new type of ICBM, which it called the Hwasong 15.

However, the North Korea's test-firing of a newly-developed intercontinental ballistic missile (ICBM) has left China feeling gravely concerned.

On Wednesday, China's Foreign Ministry opposed North Korea's latest missile launch in an unusual rebuke of its neighbor and ally.

"China strongly demands the Democratic People's Republic of Korea (DPRK) abide by the UN Security Council resolutions and refrain from actions that heighten the tension on the Korean Peninsula," Foreign Ministry spokesperson Geng Shuang was quoted as saying by Xinhua news agency.

Geng further added that China hopes that the relevant parties will continue to cautiously work together for the peace and stability on the Korean Peninsula.

Beijing's reaction came after Pyongyang tested another ICBM early Wednesday as it claimed that it was capable enough of reaching the US mainland.

According to North Korea's state media, the Hwasong-15 missile is said to be the most powerful ICBM which carried a "super-large heavy warhead" to unprecedented heights of almost 4,500 kilometers.

The test, which defied international sanctions imposed over Pyongyang's weapons programme, quickly drew swift international condemnation with the UN Security Council due to convene an emergency session.

While Japanese Prime Minister Shinzo Abe called the launch an intolerable and violent act, South Korea carried out live-fire exercises and launched one of its own ballistic missiles in response.

US President Donald Trump responded by saying: "We will take care of it."

VIDEO: Here's what Donald Trump recently told the United Nations about North Korea.