Can Huaning County Detention Center in Yuxi send a letter?

Of course.

If a party is detained in a detention center, he shall be criminally detained or arrested on suspicion of committing a crime.

In the existing judicial practice, the parties detained in the detention center for suspected crimes can communicate with their families, and the parties can also write letters to their families. However, the contents of letters are generally reviewed by the detention center, and the contents of letters cannot involve specific cases, affect the trial of cases, or affect the supervision of the detention center on the parties.

In addition, if the client has a lawyer to defend him, he can also ask his family to entrust a defense lawyer by letter, and the family will go through the entrustment formalities with the law firm on his behalf and entrust a defense lawyer for the client.