A lawyer's letter is a notice sent by a law firm to the parties when entrusted, informing them of their legal obligations and responsibilities. If China Post calls and says that a lawyer's letter is sent from Hangzhou, Zhejiang, then someone may use the name of the postal company or forge the letter of the postal company.
Therefore, if you receive such a phone call or email, I suggest you don't believe it easily. You can check the relevant official website or consult a professional to confirm the authenticity of the information. At the same time, if false information is found, it can also call the police in time.