The blogger was sentenced to eight months in prison for commenting on Chinese soldiers who were killed in clashes with Indian soldiers on the border with the Himalayas last year.
Qiu Ximing was convicted of "condemning heroes and martyrs."
According to the state newspaper Global Times, he was charged with the first crime under an amendment to China's criminal law.
Under this law, defendants can be imprisoned for up to three years.
Mr. Qiu was also ordered to publicly apologize. He appeared on the state video surveillance system, where he said that he was "very ashamed" of himself.
According to the Global Times, “My behavior was a severe blow to my conscience,” he said.
Tensions between India and China erupted in June last year on the disputed Himalayan borders.
Delhi later reported that 20 Indian soldiers had been killed in action. Beijing has identified the victims but did not provide details.
It was later reported that four of his soldiers were killed but in reality, the Chines casualty is 45.
It was the first skirmish in the disputed border zone in 45 years.
"The infamous hero"
Mr. Qiu, who has 2.5 million followers on the microblogging site Weibo, wrote a controversial post on February 10.
He was arrested and later confessed to "illegal behavior in order to attract the attention of citizens, distort the facts about Weibo, and defame and humiliate the heroes of the border guards."
Weibo also announced the suspension of Mr. Qiu's account for one year.
India and China have been involved in a border dispute for decades. The main cause of stress is an incorrectly defined 3,440 km boundary called the actual control line.
Rivers, lakes, and snow along the border meant that the line could be moved, colliding face to face in many places, causing controversy. However, there is a long-term agreement between the two countries to prevent the use of weapons or explosives at the border.
In January of this year, the two armies also clashed on the border in northeastern Sikkim, India, injuring soldiers on both sides.
But since then, India and China have decided to "secede" from the border, now in the process of moving away from parts of it.