Storage company Ruihai Logistics illegally obtained safety clearances while officials turned a blind eye, police say.
Hundreds of PLA veterans are detained ahead of the anniversary celebration, which will be attended by 30 heads of state.
Authorities in the northern city of Tianjin refuse to confirm the whereabouts of Bao Longjun or his wife and fellow rights lawyer Wang Yu.
Residents of Tianjin say they want compenation for homes damaged in the warehouse blasts earlier this month.
The country's central bank didn't intervene to prop up shares over the weekend, as expected.
Companies and individuals could face large fines and jail terms amid allegations they took money to write 'positive' reports or to suppress 'negative' ones.
His defense attorney says the basis for the move was questionable.
The latest to be sent home from the airport had defended one of the five feminists detained ahead of International Women's Day.
Former state prosecutor and dissident author Shen Liangqing is handed a nine-day administrative sentence.
Some are hackers, while activists say others may be people who expressed peaceful dissent or acted as citizen journalists online.
Residents say they are staying home, as high levels of cyanide are found in water near the site of last week's explosion.
Two websites focusing on citizen journalism about rights activists and anti-graft campaigners run into problems.
Students, out-of-town visitors and anyone with a complaint will be barred from the Chinese capital ahead of the military display.
Tight online controls and police detentions target anyone caught 'spreading rumors' about the disaster.
Officials say sodium cyanide has been detected at the disaster site after residents reported a 'bitter smell' to RFA.
The country's media has been warned to stick to official scripts on the disaster, while social media posts from the scene are being deleted.
State department officials also call for charges against feminist five to be dropped.