Anlotinib hydrochloride
DrugDrug: Anlotinib Hydrochloride Anlotinib hydrochloride will be given with a daily dose of 12 mg for 14 days of a 21-day cycle up to 2 cycles, initiated on the first day of radiation therapy and followed by adjuvant treatment with the same dosing schedule until patients have disease progression or intolerable toxicities.