Table 2.

Basic information of interviewees.

Variable	Description	Number	Percent	Variable	Description	Number	Percent
Gender	Male	158	72%	Age	18-35 years old	84	38%
	Female	62	28%		36-50 years old	97	44%
Educational background	College	23	11%		>50 years old	39	18%
	University	139	63%	Nature of work units	Component manufacturers	51	23%
	Postgraduate or higher	58	26%		Developers	37	17%
Working experience	<3 years	43	19%		Contractors	46	21%
	3-5 years	121	55%		Design units	33	15%
	6-10 years	48	22%		Supervisory units	24	11%
	>10years	8	4%		Scientific institutions and universities	29	13%