His tightening of the net directly put the Jianzhou Jurchens of Nurgan Commandery on edge, while the Oirats suffered a heavy blow as well. The pressure on their delegation mounted by the day. In the end, through negotiations, they agreed to submit to the Ming Dynasty and allow it to establish vassal prefectures on Oirat territory. However, they demanded to preserve their royal court, have the Ming Dynasty confer a khan upon them, and forbid the enslavement of Oirat nobles...
Kuang Ye telegraphed the terms of the agreement back to the Capital City. After deliberation, the Imperial Court made only slight revisions before approving it.
On the fifth day of the second month in the fourth year of Jingtai, the two sides formally signed the peace agreement at Khalkha. The Oirats and Tatars submitted to the Ming Dynasty and were forbidden from rebelling or causing further unrest. The Ming Dynasty would establish vassal prefectures to govern the Oirats and Tatars...
There were three vassal prefectures: Lingxi Vassal Prefecture, He Lin Vassal Prefecture, and Lingdong Vassal Prefecture.
Lingxi Vassal Prefecture included Tielian Guti.
Part of the Imperial Court's great army had already withdrawn. Once the treaty was formally signed, Kuang Ye ordered the three armies to return to the court, leaving only a portion behind to build the vassal prefectures.
He opened the defense line and allowed the Oirat army that had been blocked outside to enter. Together with the Oirat side, he came forward as a representative of the Ming Dynasty to sternly rebuke Yesen, who had taken the initiative in starting the war. He then soothed them, saying that the Emperor knew they had been deceived and coerced by Yesen. Regardless of old grudges or new enmities, the Emperor would let bygones be bygones and allow them to return