North Korean leader Kim Jong-un, right, and Chinese President Xi Jinping shake hands ahead of their summit in Pyongyang, Monday, in this photo provided by China's foreign ministry. Yonhap

North Korea and China reaffirmed their commitment to supporting each other's interests and pledged to usher in a new era in bilateral relations, Pyongyang's state media reported Tuesday.

The Korean Central News Agency (KCNA) reported that leader Kim Jong-un and Chinese President Xi Jinping held summit talks the previous day, where they agreed to put their traditional friendship on firmer ground and expand cooperation across politics, the economy, culture, science and the military.

"The two leaders discussed important issues to bring DPRK-China's traditional friendly ties to a firmer ground," the KCNA report said, adding they "reached an agreement to open a new era" in their relations. DPRK stands for the North's official name, the Democratic People's Republic of Korea.

The two also agreed to strengthen strategic cooperation and defend each other's sovereignty and safety, according to the report.