Speaking to thousands of troops and spectators mobilised for the event, Kim vowed to develop his nuclear forces at the "fastest possible speed" and threatened to use them if provoked.
Beijing has dismissed European criticisms as biased and driven by an anti-China agenda being pursued by its chief global rival, the United States.
KPMG and PricewaterhouseCoopers both said Sunday they would end their relationships with their Russia-based member firms. KPMG said it was also pulling out of Belarus.
The US decision came after months of diplomatic talks between the two countries that began during the tenure of former US president Barack Obama.