护照丢失或损毁怎么办？如何补办或换发？

根据中国'出境入境管理法'第四十八条规定，护照丢失或损毁的，应当及时向签发机关申请办理补发、换发手续。同时，根据'中华人民共和国护照法'第十五条规定，护照被盗、丢失或损毁的，应当及时向签发机关申请办理补发、换发手续。

英文翻译内容：According to Article 48 of the Chinese Exit and Entry Administration Law, if a passport is lost or damaged, the holder should promptly apply to the issuing authority for replacement or reissuance procedures. Additionally, according to Article 15 of the Chinese Passport Law, if a passport is stolen, lost, or damaged, the holder should promptly apply to the issuing authority for replacement or reissuance procedures.