Generally, it is a "formal establishment", not a dispatch system. However, there are so many branches and posts in China Merchants Bank that it is hard to say whether there will be substitution in a certain region. You can directly ask the person in charge of job recruitment, or you can send detailed job information to the human resources department of China Merchants Bank for consultation.
The China Merchants Bank exam includes a full set of real questions, the latest version of the exam outline, a full set of online video courses and handouts, and 50 sets of simulated test papers. I saw this material last year and passed the exam. Now I'm on the job. You can refer to these review materials yourself. There are packages and downloads in the blue spinach.