(CNN) -- Outspoken Chinese artist Ai Weiwei has received support and financial aid from a fellow activist after Beijing this week ordered him to pay 15 million yuan ($2.3 million) in back taxes.
Prominent Chinese human rights campaigner Hu Jia, who was released from jail in June after serving a 3 1/2-year sentence for "inciting to subvert state power," posted the offer on his Twitter account.
"I sent 1,000 RMB ($157) to AiWW as a response to authority's tax verdict. My great gratitude and respect for what he has done," Hu wrote.
The message was also posted on Sina Weibo, a Chinese microblogging site akin to Twitter, asking for people's support.
Hu told CNN he and his wife visited a post office on Thursday morning to transfer the money.
"Because I am still under restriction and deprived of my political rights, I cannot do too much more than sending money," Hu said. "We know that he used to help lots of people in difficulty, and is very generous. We cannot stand by when he is in trouble."
Hu said his online posts had garnered many responses from netizens, and other people were now also sending Ai money.
Ai, who called the tax decision "retaliation against a dissident," said that two Beijing tax bureau representatives visited him Tuesday and presented him with documents from the tax authority, ordering the company FAKE Cultural Development Ltd. -- registered by Ai's wife Luqing -- to pay the taxes within 15 days.
Ai, who designed the distinctive "Bird's Nest" stadium for the 2008 Olympic Games in Beijing, said he is not even the legal representative of the company, but that police warned him Monday that as the "factual controlling person" of the company, he'd better prepare the money and pay it himself.
"They told me that 'The country said that you evade tax, then you evade tax. The country won't change the verdict, so don't you ever think it will. There's nothing you can do,'" Ai said.
The artist was detained in April on grounds of tax evasion. However, his family and human rights advocates believe that the real reason for his imprisonment is his criticism of the Chinese government. Ai was released on bail in June for his good attitude and medical concerns, according to state-run news agency Xinhua.
Local authorities held a closed hearing in July on the tax evasion allegations despite demands for an open hearing from Ai and the company's lawyers. According to the artist, authorities also declined their demand to publish the accounting records and other evidence that lead to the tax evasion charge.
Ai told CNN he was initially detained and imprisoned on charges of "subversion of state power," but upon his release the charge was changed to tax evasion.
"This is against judicial law, and is unethical. How can a country use this way to try to silence dissidents?" he asked.
Ai said he'll consult with the lawyers on the next step, but so far there is no clear plan for him regarding how to pay the tax or if he is going to appeal. "The verdict is not reasonable, but we have to obey," Ai said. "If the government is not reasonable, no one can resist it."
"China always uses tax issues to cover up political issues. If the government keeps taking revenge on its dissidents with the law, it will only lead the country to its opposite side," Ai said.