If the old passport is full, cancel the old passport, issue a new passport, and indicate the old passport number on the new passport;
If the passport is not full, put an extension statement on the old passport. If there is a bad record on the old passport, it is recommended to report the loss. Proof of loss of new passport. Otherwise, you need to apply for a new visa, because the new passport contains the information of the old passport, and the old passport also needs to be provided.
Different countries issue different types of passports. Passports in China are divided into diplomatic passports, official passports and ordinary passports, and ordinary passports are divided into ordinary passports for business and ordinary passports for private purposes.
Diplomatic passports are mainly issued to China government officials above deputy ministers and vice governors, heads and deputy heads of important delegations such as the party, government and army, as well as diplomatic officials, consular officials and their accompanying spouses, minor children and diplomatic envoys.
Official passports are mainly issued to the staff of government departments at all levels in China, the staff of Chinese diplomatic missions abroad, consular offices, United Nations organizations and relevant specialized agencies, their accompanying spouses and minor children.
Ordinary passports on business are mainly issued to those who go abroad to engage in business activities such as economy, trade, culture, sports, health, scientific and technological exchanges in state-owned enterprises and institutions in China, and those who are sent abroad for study, further study, visiting scholars and labor services.
Ordinary passports for private purposes are issued to China citizens who have settled abroad for personal reasons, such as visiting relatives, friends, inheriting property, studying abroad at their own expense, employment and tourism.
References:
Passport-Baidu Encyclopedia