Chinese citizens holding valid diplomatic passports, service passports and passports for public affairs with their accompanying persons using the same passport are exempt from visa application when they enter, leave or transit Vietnam. Chinese citizens holding valid ordinary passports to enter or leave the country shall apply for a visa in advance (except for being exempt from visa application). If meeting the relevant conditions, a landing visa is available. Vietnamese embassies and consulates in China generally issue DT (investment) visa, DN (enterprise personnel) visa, DL (tourism) visa and other types of visas. In Vietnam, there are additional LS (lawyer visa) and EV (electronic visa) visas, and some types of visas have been further refined. Chinese citizens holding ordinary passport (begins with the letter G) can apply for Vietnam e-visas, while ordinary e-passports (begins with the letter E) can not apply for e-visas currently.