Legal analysis: It is illegal to engrave someone else’s private seal privately. Anyone who commits one of the following acts shall be detained for not less than ten days but not more than fifteen days, and may also be fined not more than one thousand yuan; if the circumstances are relatively minor, he shall be detained for not less than five days but not more than ten days, and may also be fined not more than five hundred yuan: 1 , Forging, altering or buying and selling official documents, certificates, certification documents and seals of state organs, people's organizations, enterprises, institutions or other organizations; 2. Buying, selling or using forged or altered state organs, people's organizations, enterprises, institutions or other organizations Official documents, certificates, and certification documents of units or other organizations; 3. Forging, altering, or reselling train tickets, ship tickets, air tickets, theatrical performance tickets, sports competition tickets, or other valuable tickets or vouchers; 4. Forging , altering the ship's registration number, buying, selling or using forged or altered ship's registration number, or altering the ship's engine number.

Legal basis: Article 52 of the "Public Security Administration Punishment Law of the People's Republic of China" Whoever commits any of the following acts shall be detained for not less than ten days but not more than fifteen days, and may also be fined one thousand A fine of not more than RMB 500 shall be imposed; if the circumstances are relatively minor, he shall be detained for not less than five days but not more than ten days, and may also be fined not more than RMB 500:

(1) Counterfeiting, altering or trading in state organs, people's organizations, enterprises , official documents, certificates, certification documents, and seals of public institutions or other organizations;

(2) Buying, selling or using forged or altered official documents of state agencies, people's organizations, enterprises, public institutions or other organizations , certificates, certification documents;

(3) Forging, altering, or reselling train tickets, ship tickets, air tickets, theatrical performance tickets, sports competition tickets, or other valuable tickets or vouchers;< /p>

(4) Forging or altering ship registration numbers, buying, selling or using forged or altered ship registration numbers, or altering ship engine numbers.