Experts’ enthusiasm
The enthusiasm of the experts was assessed by way of the response rate of the questionnaires. In the first round of expert consultation, 28 questionnaires were distributed while 26 valid questionnaires were returned, with a response rate of 92.86%. In the second round, 26 questionnaires were distributed while 26 valid questionnaires were returned, with a response rate of 100%. In the two rounds of consultation, 16 and 3 experts respectively put forward their suggestions on the revision of the course items, indicating that the experts had a good enthusiasm in this study. The details were shown in Table 
Response rate of the questionnaire