Is the information sent by Yang Ming Law Firm true?

Such short messages should be fake, not sent by a law firm, and probably fraudulent. A regular law firm will not send you a text message telling you to sue you, or send a lawyer's letter or sue you directly.

Whether it is a scam or not needs to be verified. It is unscientific to identify whether it is a scam or not according to a number, because scammers can use pseudo base stations to imitate various numbers. You can refuse to receive this number or call the police directly, which belongs to the scope of the public security organs.