My traveller is an Indian passport holder and he has a single-entry Chinese visa for a month.
His routing is as follows: Delhi (DEL) -x Guangzhou (CAN) - Beijing (PEK) // (Surface) // Ulaanbatar (ULN) -x Guangzhou (CAN) -x Beijing (PEK) - Delhi (DEL)
Once he enters China, he will apply for a one-month Mongolia visa in China.
While returning to India, his flight from ULN to DEL has to stop in China. Does he require a China visa or a transit visa?
