Task: Question Answering
Input (English): Passage: In his usurpation of the throne from the Jianwen Emperor (r. 1398–1402), the Yongle Emperor was aided by the Buddhist monk Yao Guangxiao, and like his father, the Hongwu Emperor, the Yongle Emperor was "well-disposed towards Buddhism", claims Rossabi. On March 10, 1403, the Yongle Emperor invited Deshin Shekpa, 5th Karmapa Lama (1384–1415), to his court, even though the fourth Karmapa had rejected the invitation of the Hongwu Emperor. A Tibetan translation in the 16th century preserves the letter of the Yongle Emperor, which the Association for Asian Studies notes is polite and complimentary towards the Karmapa. The letter of invitation reads,My father and both parents of the queen are now dead. You are my only hope, essence of buddhahood. Please come quickly. I am sending as offering a large ingot of silver, one hundred fifty silver coins, twenty rolls of silk, a block of sandalwood, one hundred fifty bricks of tea and ten pounds of incense."
In order to seek out the Karmapa, the Yongle Emperor dispatched his eunuch Hou Xian and the Buddhist monk Zhi Guang (d. 1435) to Tibet. Traveling to Lhasa either through Qinghai or via the Silk Road to Khotan, Hou Xian and Zhi Guang did not return to Nanjing until 1407.
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. Zhengtong had the following message delivered to the Great Treasure Prince of Dharma, the Karmapa:
Out of compassion, Buddha taught people to be good and persuaded them to embrace his doctrines. You, who live in the remote Western Region, have inherited the true Buddhist doctrines. I am deeply impressed not only by the compassion with which you preach among the people in your region for their enlightenment, but also by your respect for the wishes of Heaven and your devotion to the Court. I am very pleased that you have sent bSod-nams-nyi-ma and other Tibetan monks here bringing with them statues of Buddha, horses and other specialties as tributes to the court.
Despite this glowing message by the Emperor, Chan writes that a year later in 1446, the Ming court cut off all relations with the Karmapa hierarchs. Until then, the court was unaware that Deshin Shekpa had died in 1415. The Ming court had believed that the representatives of the Karma Kagyu who continued to visit the Ming capital were sent by the Karmapa. 
Question: What is the first name of the person who said he was deeply impressed not only by the compassion with which you preach among the people in your region for their enlightenment, but also by your respect for the wishes of Heaven?
Output (English): Zhengtong.