The United Nations High Commissioner for Human Rights Michelle Bachelet arrived in China on Monday, kicking off the first trip by a holder of the office since 2005 amid concerns that it could lead to an endorsement rather than scrutiny of China's rights record.

During the six-day trip, Bachelet will visit Xinjiang, where the High Commissioner's office said last year it believes the mostly Muslim ethnic Uyghurs have been unlawfully detained, mistreated and forced to work.