Integrated intensity contours of the ¹³CO emission clouds superimposed on the MIPSGAL 24 μm colorscale. The contour levels range from 2.17 to 8.68 by 1.09 K km s^-1. The integration range is from −14.5 to −6.5 km s^-1. The letters from A to I indicate the positions of nine molecular clumps, and the symbols “”, “ × ”, and “■” indicate the positions of class I, class II, and IRAS point sources, respectively. The white ellipse indicates the position of bubble N131. The beam size of ¹²CO emission is given in the filled red circle. The unit of the color bar is in MJy sr^-1.