Dear Anupam Kumar Das,
Thanks for contacting Top China Travel.
Traveller from Sri Lanka and Bangladesh should be paid attention that it may be hard to successfully apply the China tourist visa if you are individual traveler or a travel group with 4 pax or fewer.
So the basic conditions to apply China tourist visa for travelers from Sri Lanka and Bangladesh are:
► A travel group with at least 5 pax (including 5 pax)
► The original invitation letter authorized by related China Foreign Affair department
Quotation based on 5 or above pax is offered for you, while quotation based on 4 or fewer pax may be refused by us because of the hard China tourist visa application procedure.
You may find more details at
China Tourist Visa for Travellers from Sri Lanka and Bangladesh
Any further request or question, please feel free to contact with us.