sir,last year 2009 i went to china for marraige purpose by "L" visa that had been issued from islamabad......in china due to documentation problem i didn,t get the marraige certificate.....this year i again applied at islamabad china embassy and this time got "F" VISA........as it ok for me by going through "f" visa....i might be concerned that embassy has mistakenly issue me a "f" visa .........please clarify it