You need to provide the following docs ＆ info in advance .
1、color-scan/photo of of valid passport photo page.
2、color-scan/photo of valid China cisa page.(except L visa)
3、From which city of China you plan to enter Tibet ＆ which city you plan to depart to after your Tibet travel.
4、Job occupation.If currently unemployed or retired ,please let us know your former job.
You can ask us further questions by http:www.greattibettour.com