Mr.Mujibul Haque, it is not difficult for you to get a single-entry tourist visa to China, however, Invitation letters in Chinese language by individual/entity in China and six-month bank statement are also required for China tourist visa application, you also need to prepare the below documents:
. Valid passport (at least six months before expiration) with blank visa pages and copy of the first three pages;

2. TYPED Visa Application Form (download from https://www.travelchinaguide.com/embassy/pdf/visa-application.pdf) with one passport photo.

3. Applicants who have never been to China before should submit in person.