Sources say Chinese President did not get security clearance to continue with the scheduled tour.

ISLAMABAD (Dunya News) – Chinese President Xi Jinping on Thursday postponed his official visit to Pakistan after his security team withdrew the security clearance owing to the sit-in protest marches and ongoing political crisis in Pakistan, Dunya News reported citing sources.
Chinese President was offered to hold the meetings in Lahore as an alternative but the security clearance was not given by his team citing Lahore being densely populated as the reason.