Whether Tang Long's system class is worth applying for should be evaluated according to your specific situation and needs. Here are some considerations:

First of all, you need to know the educational background and teaching experience of Tang Long's senior students. If he has a deep academic background and rich teaching experience in a certain field, then his systematic course may be more professional and targeted. You can check his qualifications and background information, or search for relevant evaluation and feedback to understand his teaching level.

Secondly, you need to consider whether the content of the systematic course meets your learning needs and goals. If what you need is a comprehensive and multidisciplinary training, then the systematic class of senior Tang Long may not be the best choice. But if you need in-depth training in a specific field, then his systematic courses may be more suitable for your needs. You can check the syllabus and teaching content, or communicate with him to understand the depth and breadth of the course content.

Third, you need to consider the price and course time of systematic courses. If your time and budget are limited, then you need to weigh whether the course price and course time are in line with your budget and schedule. You can check the price and schedule of the course, or communicate with him to see if there is a more suitable time and price schedule.

Finally, you need to know whether Tang Long's senior's educational philosophy and teaching methods meet your learning style and needs. If his educational ideas and methods meet your learning style and needs, then you will be more easily integrated into the course and achieve better learning results. You can consult his educational ideas and methods, or communicate with him to find out whether his teaching methods are suitable for you.

To sum up, whether Tang Long's system courses are worth reporting needs to be evaluated according to your specific situation and needs. You can check the relevant information and feedback, or communicate with him for more information.