Xiaoyang Liu, a native and citizen of China, petitions for review of an order of the Board of Immigration Appeals (“BIA”) affirming without opinion the immigration judge’s (“U”) denial of his application for asylum, withholding of removal, and protection under the Convention Against Torture (“CAT”).

Because Liu has failed to address the IJ’s rejection of his applications for withholding of removal and relief under the CAT, he has waived these issues on appeal. See Yohey v. Collins, 985 F.2d 222, 224-25 (5th Cir. 1993); Soadjede v. Ashcroft, 324 F.3d 830, 833 (5th Cir. 2003).

The IJ found that Liu’s asylum application both was untimely and should be denied on its merits. This court has jurisdiction to review the rejection of the asylum claim on its merits, but it does not have jurisdiction to review a determination that the asylum application was not timely. See 8 U.S.C. § 1158(a)(2)(C); Zhu v. Ashcroft, 382 F.3d 521, 527-28 (5th Cir. 2004). Because it is impossible to determine whether the BIA’s affirmance was based on the non-reviewable determination that the application was untimely or on the reviewable determination that the application should be rejected on its merits, we VACATE the BIA’s order and REMAND the case with instructions to explain its basis for affirming the IJ’s decision.