China has inveighed against the Turkish claims that it is mistreating its Uyghur minority after a dispute over the fate of a prominent musician.
Turkey cited reports that Abdurehim Heyit had died in a detention camp and described the treatment of Uighur China as "great embarrassment for humanity".
China then released a video showing Mr. Heyit alive.
Uighurs are a Muslim minority in northwestern China who speak a language closely linked to Turkish.
They have come under intense surveillance by the authorities and up to a million Uighurs are detained. A significant number of Uyghurs have fled to Turkey from China in recent years.
China has asked Turkey to revoke its "false" claims. A spokeswoman for the Chinese Foreign Ministry said that the musician was "very healthy".
"We hope that the competent Turkish people can distinguish between right and wrong and correct their mistakes," spokeswoman Hua Chunying told reporters.
What's in the video?
The video was released by the Turkish-language service of China Radio International, which declared Turkey's criticism of China to be unfounded.
On February 1
The musician seems to be" about to be investigated for alleged violation of national laws ".
It gives the date of the video and says that" it has never been mistreated. "
The man wears civilian clothes and speaks the Uyghur language.
What did Turkey say?
Foreign Ministry of Turkey said that the detained Uighurs were subjected to "torture" in the "concentration camps".
Foreign Ministry spokesman Hami Aksoy said that the news about the death of Mr. Heyit "further strengthened the reaction of the Turkish public to serious violations of human rights in Xinjiang ".
China described the comments as" completely unacceptable. "
Meanwhile Nury Turkel – US President – Uyghur Human Rights Project – said all to BBC that some aspects of the video are "suspicious".
Turkel states that China has the technology to meditate on the movie and said that "the responsibility of proving that the video is authentic"  The BBC journalist "speaks" languages that he can not
So far, few countries with a Muslim majority have joined the public international condemnation of the charges.
Analysts say many fear political and economic reprisals from China.
Turkey's Strategic Clash  by John Sudworth, BBC News, Beijing
Critics have long seen Turkey's silence on China's Uyghur situation as a strategic blunder, undermining the crisis. high pretension of President Recep Tayyip Erdogan to the moral leadership of the Muslim world.
But relying late on his condemnation of China's internment camps system on an unjust claim to a death in custody could be seen as an even bigger mistake.
This is certainly the vision of the Chinese foreign ministry. "The video provided excellent evidence for the truth," said the ministry spokesman.
In reality, it is impossible to verify anything about the status of Abdurehim Heyit. Before the claims of the musician's death and the rapid refutation of China, there had been no official news about his detention.
Like hundreds of thousands of Uighurs, he had simply disappeared into a legal black hole.
And the video bears all the hallmarks of the forced television confessions regularly produced by the joint efforts of the Chinese courts controlled by the Communist Party, police investigators and state media.
China has been ready to argue that reports of Mr. Heyit's death prove that many of the criticisms of the situation in Xinjiang are based on lies.
But critics will continue to argue that the confusion – resulting from the lack of independent scrutiny – shows exactly why there is such a growing concern, even, finally, in Turkey.
Hidden Fields of China
What do we know about Heyit's fate?
Heyit was a famous dutar player, a two-stringed instrument that is notoriously difficult to master. At one time, it was revered throughout China. He studied music in Beijing and later performed with national art companies.
Mr Heyit's detention came from a song he had played, entitled Fathers. He takes his texts from an Uyghur poem that invites the younger generations to respect the sacrifices of those who preceded them.
But three words in the texts – "martyrs of war" – seem to lead the Chinese authorities to conclude that Mr. Heyit presented a terrorist threat.
Who are the Uighurs?
Uighurs make up about 45% of the population in Xinjiang.
They consider themselves culturally and ethnically close to the nations of Central Asia .
In recent decades, a large number of Han Chinese (the Chinese ethnic majority) have emigrated to Xinjiang, and Uyghurs feel their culture and livelihood are threatened.
Xinjiang is officially designated as an autonomous region within China, like Tibet to the south.