I want to know the answer to the following question:
What years did the Zhengtong Emperor reign?
All the background I'm provided with is that "The Information Office of the State Council of the PRC preserves an edict of the Zhengtong Emperor (r. 1435–1449) addressed to the Karmapa in 1445, written after the latter's agent had brought holy relics to the Ming court.". Is that enough to answer the question?
Answer: yes