Beijing (CNN) -- The wife of Ai Weiwei was taken from the Chinese artist's studio by police Tuesday and was questioned for three hours, the high-profile dissident said. 

Four policemen took Lu Qing from the Beijing studio to a nearby police station, he said. 

She was released by police after questioning and is now a "criminal suspect," he said. 

They have not told her what crimes she is accused of, he added. 

"I think the authorities are trying to threaten me through her," he said, speculating that Lu's arrest was related to her plans to visit Taiwan for an exhibition of her husband's work. 

She has now been told to stay in Beijing, he added. 

Police did not respond to a CNN request for comment on the case. 

"Nobody can consider himself safe or innocent in an environment like this," said the dissident, who was himself detained by police for 81 days earlier this year. 

He was ultimately charged with tax evasion, and last week paid $1.3 million so he can contest the charges brought against his company, Fake Cultural Development Ltd. 

Had he not paid the sum, his wife -- who legally represents the company -- would have been jailed, he said. 

The government says the company owes 15 million yuan ($2.3 million). The money was raised from 30,000 contributors, he said. 

His lawyer, Pu Zhiqiang, said last week that Ai intends to return the donations if he wins the case and is refunded the money. 

His family and human rights advocates believe that the real reason for his imprisonment is his criticism of the Chinese government.  QUESTIONS:

Q1:
1. What is the name of Ai WeiWei's company?
2. What is Ai WeiWei's company called?
3. What is Ai WeiWei's company officially called?
Q2:
1. What place is the report on Ai WeiWei from?
2. The report on Ai WeiWei is from where?
3. Where is the report on Ai Weiwei from?
Q3:
1. What happened to Ai WeiWei's wife?
2. What events transpired with Ai WeiWei's wife?
3. What was done to Ai WeiWei's spouse?
Q4:
1. Where was Ai WeiWei's wife taken?
2. What place was Ai WeiWei's wife taken to?
3. Where was the wife of Ai WeiWei taken to by the police?
Q5:
1. Where was Ai WeiWei's wife taken from?
2. Where did police pick up Ai WeiWei's wife from?
3. Where was Ai WeiWei's wife when she was picked up by the police?
Q6:
1. How long was Ai WeiWei's wife questioned for?
2. For how long did police keep Ai WeiWei's wife?
3. How long did police interrogate Ai WeiWei's wife?
Q7:
1. How many policemen took Ai WeiWei's wife from their studio?
2. Ai WeiWei's wife was taken away by how many policemen?
3. How many police officers were deployed to pick up Ai WeiWei's wife?
Q8:
1. Was Ai WeiWei's wife kept at the station overnight?
2. Was Ai WeiWei's wife interrogated by the police overnight?
3. Did Ai WeiWei's wife spend the night at the police station?
Q9:
1. What is Ai WeiWei's wife being considered as now?
2. What has Ai WeiWei's wife become now?
3. 
Q10:
1. What is Ai WeiWei's wife charged with?
2. What charges have been filed against Ai WeiWei's wife?
3. What criminal allegations have been made against Ai WeiWei's wife?
Q11:
1. Why does Ai WeiWei think his wife was arrested?
2. What is the reason behind Ai WeiWei's wife's arrest in his opinion?
3. Why does Ai WeiWei think police arrested his wife?
