In the letter to An'an, it described the summer on the grassland, the longing of being a big brother... and supervised her studies.
Another letter was sent to Qingyu, talking about his current situation and discussing some cultivation issues. He also mentioned that a batch of gifts with Mugu characteristics would be sent through a special channel to a city in Yun Country, reminding Qingyu to receive them. She and An'an both have a share.
Both letters were sent by Yun He.
Lastly, he wrote a letter to Lin Youxie from the Triple Punishment Palace, inquiring about recent events, wishing her well-being, and asking about the matter of the Winter Cicada. This letter was entrusted to the housekeeper Xie Ping, to be delivered through the channel of the Patrol Inspection Bureau in the capital city, ensuring its timely arrival.
Within the Eastern Region, the channels of the Patrol Inspection Bureau in the capital city are quite strong.
