Naw Kham was shown on TV being led from his prison cell by police
Four foreign men have been executed in China for the murder of 13 Chinese fishermen on the Mekong river in 2011, after being paraded on state TV.
The men were put to death by lethal injection in Kunming, Yunnan province.
CCTV News broadcast live footage of the men being taken from their cells to the execution site, though it did not show the moment of death.
Many social media users in China have reacted angrily, condemning the broadcast as insensitive.
It is believed to be the first time in China's recent history that live footage of condemned criminals being taken to their execution has been broadcast.
Since CCTV is controlled by the Chinese authorities, there is no doubt that the green light was given by top government officials, the editor of BBC Chinese, Raymond Li, reports.
It seems that the Chinese government wants to send out a clear signal to the general public that they are taking very tough action against foreign criminals, he adds.
Some have applauded the move, but many Chinese internet users spoke out against the special programme, in what some are saying was a throw-back to the execution rallies of China's past.
Powerful warlord
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Analysis
John SudworthBBC News, Shanghai
The case has attracted widespread public interest in China because of the brutality of the 2011 killings as well as the unusual circumstances in which China insisted on the right to conduct the trials of the non-Chinese nationals, despite neither the crime nor the arrests taking place on Chinese soil.
Now the decision to show live pictures on state TV of the four men being taken to the execution chamber has made it even more of an issue, pushing it onto the list of most-talked-about topics on Weibo, the Chinese version of Twitter .
Many posts applaud the tough justice. "The murdered Chinese crew can finally rest their souls," Hu Xijin, editor of China's Global Times newspaper writes. "It is necessary to pursue revenge and send a warning to those who kill Chinese people."
But others express unease about what they see as an unnecessary display of vengeance. "This shows the whole world that China still hasn't got rid of barbarianism yet," someone calling themselves You Niao says. "Does CCTV need to give everyone a blood bath?"
A prominent human rights lawyer, Liu Xiaoyuan writes; "Using two hours to broadcast live the process for these criminals facing the death penalty is a violation of the law."
Among the prisoners was Naw Kham, a Burmese man thought to have been one of the most powerful warlords in the Golden Triangle of Thailand, Laos and Burma.
China's state television channel CCTV aired an interview with Naw Kham on Thursday.
"I couldn't sleep properly over last two days. I miss my mother. It is really painful that I can't be with my children," Naw Kham told the channel.
"My mum didn't know when I was arrested, and I am worrying that she won't be able to take it when she finds out," he went on.
Announcing the execution on Twitter, state news agency Xinhua tweeted a photograph of Naw Kham with his hands clasped in front of his forehead. It is unclear when this picture was taken.
Xinhua has said the men had had their "legal rights fully respected" while on death row.
China's foreign ministry said the case highlighted its determination to tackle cross-border crime.
"I think an important message that this case sends is that it shows the determination of China and the governments of relevant countries to work hard together to combat cross-border crime," Hua Chunying spokesman for China's foreign ministry said.
Chinese television used to regularly broadcast the parading of condemned criminals in stadiums and through city streets on the way to executions, and although the practice largely stopped decades ago, exceptions remain, the BBC's John Sudworth in Shanghai says.
In 2008 a man who had murdered his mother was paraded in an open top truck on the way to his execution with a placard around his neck, detailing his crime. And a recent provincial TV show, in which death row prisoners were interviewed by a glamorous female presenter, attracted almost 40 million viewers.
River security
The 13 fishermen were found dead inside two Chinese cargo ships in October 2011 on the Thai side of the river.
State media said Naw Kham and his subordinates had collaborated with Thai soldiers in launching an attack on the ships, the Hua Ping and Yu Xing.
The other men were Hsang Kham from Thailand, Yi Lai, who is stateless, and Zha Xika from Laos, said the Xinhua news agency.
The group were arrested in Laos and brought to China in May last year, after Beijing said the attack had happened on board Chinese-flagged ships.
Beijing argued that the men should be extradited for trial - a move which some observers saw as an indication of the considerable political and economic clout China now exercises over its smaller neighbours, our correspondent reports.
In November, the men were found guilty of intentional homicide, drug trafficking, kidnapping and hijacking.
Two other members of the gang were also convicted - one received a death sentence with reprieve and the other eight years in prison.
Thailand launched an investigation into the allegations against nine of its soldiers in connection with the incident.
The attack came amid a wave of hijacking of vessels sailing on the Mekong which were blamed on gangs operating in the notorious drug-trafficking region.
China, Burma, Laos and Thailand launched joint security patrols on the Mekong in response.
Li Zhuqun, a senior international co-operation official at China's Ministry of Public Security said the gang had now been broken up, but that "efforts to ensure the safety of the Mekong River will continue".
"We will continue patrols and law enforcement co-operation with the other three countries to safeguard shipping on the river," he told China Daily.
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