Questão jurídica principal
Whether the appeal against the detention extension was sufficiently reasoned under Art. 42 BGG.
Decisão extraída
The filing did not meet the statutory reasoning requirements and therefore could not be examined on the merits.
Fundamentação extraída
A federal appeal must state requests and reasons and engage, at least briefly, with the contested decision; here the appellant merely asserted persecution in China and refusal to return without addressing the legal reasoning below.