SEOUL--In a congratulatory message to Kim Jong Un for the founding anniversary of North Korea's ruling party, Chinese President Xi Jinping said he intends to deepen relations with Pyongyang, North Korean state media reported on Saturday.

"We have an intent to successfully defend, consolidate and develop the China-Korea relations together with Korean comrades and propel the long-lasting and stable development of the socialist cause of the two countries," North Korean state news agency KCNA quoted Xi as saying.

Saturday marks the 75th anniversary of the founding of the ruling Workers' Party of Korea, and events are expected to include a large military parade that may feature some of North Korea's long-range ballistic missiles for the first time since 2018.

Xi said he was "greatly pleased" with the achievements that North Korea had made in recent years by engaging with foreign countries in the face of hardships and challenges, KCNA reported.

After years of cool relations during which China joined the United States and other nations in imposing sanctions on North Korea over its nuclear weapons and ballistic missile programs, Xi and Kim met five times in 2018 and 2019. The North Korean diplomatic offensive included Kim meeting with U.S. President Donald Trump.

While North Korea says it has had no confirmed cases of the novel coronavirus, strict border closures and other measures it imposed to prevent an outbreak have further strained its economy, which is heavily reliant on trade with China.