Edit download_tiles.py to specify the area and the zoom level you want.
zoom = 19
lat_start, lon_start = 31.022547,121.429391
lat_stop, lon_stop = 31.041453,121.45749
satellite = True # roads if false
You can easily find Baidu coordinates with http://api.map.baidu.com/lbsapi/getpoint/.
Then, run $ python download_tiles.py and get individual tiles
Edit merge_tiles.py to specify the area and the zoom level you want, it's just the same as before.
zoom = 19
lat_start, lon_start = 31.022547,121.429391
lat_stop, lon_stop = 31.041453,121.45749
satellite = True # roads if false
Then, run $ python merge_tiles.py and get map_s.jpg for satellite or map_r.png for roads.
Note: merging the tiles requires Python Image Library.