A Chinese Communist Party municipal committee has sent shockwaves through Asia after sharing a video created by a military commentary channel threatening a nuclear attack against Japan if the country attempts to help defend Taiwan.
The five-minute video created by military commentary channel "Liujun Taolue", which it has since deleted, was reposted by Baoji Municipal Committee of the CCP in western China and was viewed over two million times, Taiwan News reports.
Part of the video was shared to Twitter with English subtitles by Jennifer Zeng, who hosts Inconvenient Truths on YouTube, where she has over 50,000 followers and promises information from inside China.
"When we liberate Taiwan, if Japan dares to intervene by force, even if it only deploys one soldier, one plane and one ship we will not only return reciprocal fire but also start a full-scale war against Japan," the video said.
"We will use nuclear bombs first, we will use nuclear bombs continuously, until Japan declares an unconditional surrender for the second time.
"What we want to target is Japan's ability to endure a war, as long as Japan realises that it cannot afford to pay the price of war, it will not dare to rashly send troops to the Taiwan Strait."
China touted as an 'atomic' threat to Japan
The video then goes on to say when China first detonated an atomic bomb in the 1960s, it promised atomic bombs would not be used against countries without nuclear weapons, and that China would not be the first to use them.
Some 60 years on, while China's "nuclear deterrent has been somewhat affected" the decision had been a "success" the commentary video says.
"Now the international situation has changed dramatically. Our country is in the midst of a major change that has not been seen in a century," the video says.
"All political policies, tactics and strategies must be adjusted and changed in the midst of such a major change in order to protect the peaceful rise of our country."
The video then goes on to say it is "necessary" to make "limited" adjustments to China's nuclear policy and then puts forward the "Japan Exception Theory".
The video goes on to list the times Japan has "taken the initiative to harm the Chinese people".
"If Japan goes to war with China for the third time, the Chinese people will take revenge on the old and new scores," the video threatens.
"Japan is the only country in the world that has been hit by atomic bombs and has a deep memory of the atomic bombs from the government down to the people.
"And it takes the United States, which nuked it, lying down. It is exactly because Japan has a unique feeling that nuclear deterrence against Japan will get twice the result with half the effort."
Japan is the "exception" to the Chinese commitment to not use nuclear weapons against other countries or be the first to use them, the video says.
China declared Japan's biggest security risk
Earlier this month a Japanese defence review determined China is Japan's main national security concern.
"It is necessary that we pay close attention to the situation with a sense of crisis more than ever," the paper said in a new section on Taiwan.
China's recent increase in military activity around Taiwan has Japan worried since the island lies close to the Okinawa chain at the western end of the Japanese archipelago.
Taiwan's Foreign Ministry expressed thanks to Japan for attaching such importance to security in the Taiwan Strait.
But there was an angry reaction in Beijing which said Japan has "for some time now" been making baseless accusations about China's normal defence build-up and military activities.
"This is very wrong and irresponsible. China expresses strong dissatisfaction and firm opposition to this," said Chinese foreign ministry spokesman Zhao Lijian.
Chinese President Xi Jinping this month pledged to complete the "reunification" with Taiwan and in June criticised the United States as a "risk creator" after it sent a warship through the Taiwan Straits separating the island from the mainland.
Do you have a story tip? Email: email@example.com