Temperatures and Elevation at China Weather Stations: 
               January         April         July        October     Elevation
 u Station        Y_1            Y_2           Y_3          Y_4        Y_5 
 1 MuDanJia  [-18.4, -7.5]  [-0.1, 13.2]  [17.0, 26.5]  [0.6, 13.1]    4.82  
 2 HaErBin   [-20.0, -9.6]  [0.2, 11.9]   [17.8, 27.2]  [-0.2, 12.5]   3.44  
 3 BoKeTu    [-23.4, -15.5] [-4.5, 9.5]   [12.9, 23.0]  [-4.0, 8.9]   14.78  
 4 NenJiang  [-27.9, -16.0] [-1.5, 12.0]  [16.1, 25.0]  [-2.6, 10.9]   4.84   
 5 LaSa      [-8.4, 9.0]    [1.7, 16.4]   [10.8, 23.2]  [1.4, 18.7]   73.16   
 6 TengChon  [2.3, 16.9]    [9.9, 24.3]   [17.4, 22.8]  [14.5, 23.5]  32.96   
 7 KunMing   [2.8, 16.6]    [10.4, 23.4]  [16.9, 24.4]  [12.4, 19.7]  37.82    
 8 WuZhou    [10.0, 17.7]   [15.8, 23.9]  [24.2, 33.8]  [19.2, 27.6]   2.38    
 9 NanNing   [11.5, 17.7]   [17.8, 24.2]  [25.8, 33.5]  [20.3, 26.9]   1.44    
10 ShanTou   [11.8, 19.2]   [16.4, 22.7]  [25.6, 32.6]  [20.4, 27.3]   0.02