Motorcycles leave the Diaoyutai State Guesthouse in Beijing on Jan. 8, leading a car believed to be carrying North Korean leader Kim Jong Un. The guesthouse has hosted visiting foreign dignitaries for decades. Photo: IC

People's Liberation Army soldiers and police officers stand guard in front of Beijing Railway Station before the alleged arrival of North Korean leader Kim Jong Un on Jan. 8. Photo: IC

A motorcade believed to be carrying North Korean leader Kim Jong Un leaves Beijing Railway Station on Jan. 8. Photo: IC

A car believed to be carrying North Korean leader Kim Jong Un leaves Beijing Railway Station on Jan. 8. Photo: IC

Kim Jong Un meets with President Xi Jinping at the Great Hall of the People in Beijing on Jan. 8. Photo: Xinhua

North Korean leader Kim Jong Un visits a Tongrentang Co. Ltd. pharmaceutical factory in Beijing's Daxing district on Jan. 9. Photo: VCG

North Korean leader Kim Jong Un listens to a staff member at a Tongrentang Co. Ltd. pharmaceutical factory in Beijing's Daxing district on Jan. 9. Photo: VCG