A criminal suspect or defendant can be helped by the lawyer in any of the following circumstances: (1) he may be sentenced to criminal detention or criminal detention, or to apply the supplementary penalty independently; (two) he may be sentenced to more than a fixed-term imprisonment and shall not be subject to social danger while taking bail; (three) he has serious illness, can not take care of himself, is pregnant or is nursing his baby. (4) when the term of custody has expired and the case has not yet been completed, it is necessary to take bail pending trial.