What sent an inspiring message?

You can know after watching the TV series cheerup. Du Haiyi, the heroine of Korean drama Cheerup, received the news of her death because the glasses man retaliated against her. As a very energetic girl, Du Haiyi is very popular in cheerleading. Glasses man was jealous of Du Haiyi's popularity in cheerleading, so he thought of sending him threatening text messages. Glasses man wanted to have a chance to appear on the stage, so he sent a death message, hoping that the hostess could step down.

Short message: ShortMessageService, referred to as short message service, refers to the text or digital information directly sent or received by users through mobile phones or other telecommunication terminals. The number of characters that users can send and receive SMS at a time is 160 English or numeric characters or 70 Chinese characters.