Is it difficult to test the captain of the inland river class?

Difficult. To take the first-class inland river captain exam, you must first have a bachelor's degree or above. In the last five years of the examination, you can apply for the first-class captain only after you have served as the first-class and second-class inland river captain for 12 months. After passing the assessment, it will take 12 months to practice on the ship before it can be confirmed whether it can be hired. It's still very difficult to take the exam.