Technical secondary schools usually have certain autonomy and can decide whether to offer dance training during the summer vacation according to the specific conditions and policies of the school. Generally speaking, secondary technical schools can provide various types of courses, training or activities during the summer vacation to meet students' interests and needs.

If you are interested in offering dance training in a technical secondary school, you can consider the following steps:

1.** Understand the school policies: * * First of all, you need to understand the school policies and regulations to see if dance training is allowed during the summer vacation. You can consult the school management department or the relevant person in charge.

2.** Application: * * If the school allows, you can apply to the school, detailing the content, purpose and schedule of your planned dance training. It should be noted that the educational nature of the training should be considered when applying to ensure that it meets the educational objectives of the school.

3.** Make a course plan: * * If the application is successful, you can make a detailed course plan, including training content, class schedule, textbook selection, etc.

4.** Publicity and enrollment: * * Before the training begins, publicity and enrollment can be conducted to attract students to sign up. It can be promoted through school notices, posters and social media.

5.** Training: * * Once enough students are enrolled, dance training courses can be started during the summer vacation.

It should be noted that the specific situation may be different due to the school's policies, resources, teachers and other factors. When planning and offering training courses, we must cooperate with the school and abide by the relevant regulations and requirements of the school.