Legal analysis: you can be a lawyer after being detained for one night. The record of administrative detention does not affect the client. A lawyer is a lawyer and should have a lawyer's professional certificate. When taking the lawyer's professional certificate, their personal files will be reviewed. If a criminal record is found, the lawyer's practice certificate will no longer be issued. Therefore, the administrative detention of lawyers does not affect the issuance of lawyer qualification certificates.
Legal basis: Article 7 of the Lawyers Law of People's Republic of China (PRC) shall not issue a lawyer's practice certificate if the applicant is under any of the following circumstances: (1) No capacity for civil conduct or limited capacity for civil conduct; (2) Having been subjected to criminal punishment, except for negligent crimes; (3) Being expelled from public office or having his lawyer's practice certificate revoked.