What are the requirements for making a hair model?

Female models for hairstyling courses, no height requirements, appearance must be above average, hair should be thick and plentiful, not trimmed into thin layers, length should be close to shoulders or below, bangs should be below eyebrows, and can accept a small amount of hair cutting (Or if it can be cut below the ears or chin, priority will be given) and dyeing and dyeing, and it is required that the individual has good credit and no bad habits.