| 1 | Hejian after the founding of an area in Hebei Province Cangxian. | |
| 2 | As we wheeled through the gates of Tsanghsien's walls, a Kuomintang sentry at a barbed-wire barricade signaled us to a halt. | |
| 3 | After a few mild adventures, I made my way down to Tsanghsien, last Kuomintang-held city in this part of North China. | |
| 4 | The DA1-5 and DA1-1 are two CBM wells located in Cangxian County have carried out fracturing for production capacity and gas desorption rate boosting. | |
| 5 | The reservoir of the Zilaitun oil-field is mainly composed of fine sandstone and siltstone and characterized by small grain size and high shale content. |
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