1. Two-way letter of commitment: refers to the document signed by the petitioner and the petition department, in which the petitioner promises to abide by laws and regulations, not to engage in illegal petitions or make troubles, and the petition department promises to handle the petitions and reply to the petitioner within the statutory time limit.

2. Notice: refers to the written notice issued by the petition department to the petitioner, including the basic information of the petition, the handling results, relevant laws and regulations and other information. , and inform the applicant of the relevant rights and obligations.