China-Singapore Fast Lane is applicable to essential business or official travel between six Chinese provinces and municipalities (Shanghai, Tianjin, Chongqing, Guangdong, Jiangsu and Zhejiang provinces) and Singapore.
The host company or government agency in China will lodge an application on behalf of the applicant with the Foreign Affairs Office or Commerce Authority at the six provinces and municipalities. If the application is approved, an Invitation Letter (PU Letter example) will be issued to the applicant. Currently, you can only get a single-entry visa with a 30 days’ validity with an allowed stay of up to 90 days. There is no quarantine for the 6 Green Lane provinces. Apply for a business visa.