F visa application and extension (new)
As we all know, for F visa, you will need a F invitation letter, here is the latest news about F Invitation letter, including 3months, 6months and 12months:
30days one entry F invitation letter
Just need a copy of first page of passport;
working day: 5 working days;
6months multiple entries F invitation letter: (each stay of 30days)
requirements: one 6months multiple entries visa which was got within 2yr till now or three 3month one entry visa which were got within 2yrs till now.
working days: 5 working days;
12months multiple entries F invitation letter: (each stay of 30days)
requirements: two 6months multiple entries visa which were got within 2yr till now or three 3month one entry visa which were got within 2yrs till now.
working days: 5 working days;

The above invitation letter like 6months and 12months are tailor-made for those businessman who will have trips like once a month or persons who like to travel, for those long-term stay in mainland persons, you can do it in this ways:
Apply for a short-term F visa and get it extended in mainland which has no limitation on each stay, more convenient.
For F extension, you can get it extended to 3months 0/1 entry; 6months 0/1/double/multiple entries or 1yr multiple entries as you like,

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