Table 2.

Descriptive statistics of the experts

Subject	Option	Quantity	Proportion (%)
Gender	Male	16	57.2
	Female	12	42.8
Age	Under 40 years old	8	28.5
	40–50 years old	8	28.5
	50–60 years old	10	35.8
	More than 60 years old	2	7.2
Nationality	Chinese	28	100.0
Title	Senior	10	35.7
	Deputy Senior	8	28.6
	Middle	10	35.7
Highest degree	Master and above	11	39.3
	Undergraduate	17	60.7
Years engaged in position	10–20 years	14	50.0
	21–30 years	8	28.5
	More than 31 years	6	21.5