HONG KONG, Aug. 17 (Xinhua) -- The Big Four accounting firms -- KPMG, Ernst & Young (EY), Deloitte and PricewaterhouseCoopers (PwC) -- released separate statements on Friday to voice their opposition against recent violence and illegal acts in Hong Kong.

"We firmly oppose any action and statement that challenge national sovereignty. The rule of law and the 'one country, two systems' principle are the foundations to maintaining stability and harmony in Hong Kong," the statement of PwC said.

PwC said: "We condemn all violent and illegal activities, and misleading statements," adding that "We urge the society of Hong Kong to work together to address the challenges ahead, and safeguard the stability and prosperity of Hong Kong."

Deloitte said the recent escalation of tension and conflict in Hong Kong has caused significant disruptions to the society and has affected the livelihood of many in Hong Kong.

"We do not condone any form of violent or illegal behavior and hope social order will be restored soon through mutual, peaceful dialogue and co-operation of all parties concerned," it said in the statement.

Expressing confidence that Hong Kong will be able to resolve its current difficulties, Deloitte said it is committed to supporting Hong Kong, as a part of China, as Hong Kong continues to build on its success as an international financial center predicated on the "one country, two systems" concept, underpinned by the Basic Law.

Voicing opposition to all illegal and violent acts, KPMG said it hopes that Hong Kong, as one of the most important financial centers in the world, will maintain peace, tranquility, prosperity and stability under the rule of law and the "one country, two systems" principle.

Strongly condemning the violence and illegal acts that have taken place in recent weeks throughout Hong Kong, the statement of EY said: "Hong Kong's long-term stability and success as an international financial center is premised on the fundamental guiding principle of 'one country, two systems' and the rule of law."

"EY calls for a swift return of Hong Kong to a peaceful community with stable law and order for the good of all people in Hong Kong," it said.