Answer the following question: What type of details about pu zhiqiang can be gathered from the following bio? Bio: pu zhiqiang is a civil rights lawyer in the people 's republic of china specializing in press freedom , defamation , and product safety , among other issues . based in beijing , he is an executive partner of beijing huayi law firm , pu is a prominent figure in the weiquan movement , having advocated for writers and journalists in a number of high-profile cases . due to the nature of his cases and his outspoken criticisms of official policies , pu is monitored by security forces , has been detained and questioned on several occasions , and is currently in custody .
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