BEIJING, June 22: Chinese police told dissident artist Ai Weiwei on Thursday he could face bigamy and pornography charges and barred him from travel, despite lifting strict bail conditions imposed after his detention. Ai, who left his house yesterday for the first time in a year without having to report his whereabouts to police, was held for 81 days without charge in April 2011 mainly in solitary confinement until his conditional release last year. (agencies)