Six artificial line profiles and the line parameters of the two components. The first row: the variation in the line parameters of the narrow TC (squares) and broad CC (triangles) as a function of formation temperature in QS network condition, with panels A), B), and C) for relative intensity, Doppler velocity, and non-thermal line width, respectively. The dashed lines show the observational results of Peter (2001), and the solid lines show the second-order polynomial fit to them. In panel B), the Doppler velocity of CC is shifted in the y-axis by 10 km s^-1 to avoid the overlap with TC velocity. The bottom two rows: the artificial line profiles of C ii, Si iv, C iv, O iv, O vi, and Ne viii. They are built according to the line parameters as shown in solid lines in the top three panels. The dotted lines represent the profiles of TC and CC, and the diamonds are the sum of them. The red solid lines show the single-Gaussian fits to the total emission profiles.