(LEAD) N.K. leader's sister says Pyongyang's nuclear status 'irreversible'

Kim Yo-jong, sister of North Korean leader Kim Jong-un, declared that the nation's nuclear weapons status is irreversible and will not be subject to negotiation. She stated this position is a "red line" that is undeniable regardless of international recognition. Her comments were made ahead of Chinese President Xi Jinping's visit to Pyongyang, seemingly to preempt any discussion of denuclearization during the summit. North Korea also cited ongoing military threats from the U.S. as justification for its continued development of self-defense capabilities.

The statement reinforces North Korea's unwavering stance on its nuclear program, potentially complicating diplomatic efforts for denuclearization and regional stability.