A pen and ink drawing by Chen Huawen, a teacher at China University of Geosciences (Wuhan), depicts geologists working in different scenes including mineral exploration, collecting specimens and field study. The teacher has created 20 such drawings that gained wide attention in the university. (Photos: China News Service)

A pen and ink drawing by Chen Huawen, a teacher at China University of Geosciences (Wuhan), depicts geologists working in different scenes including mineral exploration, collecting specimens and field study. The teacher has created 20 such drawings that gained wide attention in the university.

A pen and ink drawing by Chen Huawen, a teacher at China University of Geosciences (Wuhan), depicts geologists working in different scenes including mineral exploration, collecting specimens and field study. The teacher has created 20 such drawings that gained wide attention in the university.

A pen and ink drawing by Chen Huawen, a teacher at China University of Geosciences (Wuhan), depicts geologists working in different scenes including mineral exploration, collecting specimens and field study. The teacher has created 20 such drawings that gained wide attention in the university.

A pen and ink drawing by Chen Huawen, a teacher at China University of Geosciences (Wuhan), depicts geologists working in different scenes including mineral exploration, collecting specimens and field study. The teacher has created 20 such drawings that gained wide attention in the university.

A pen and ink drawing by Chen Huawen, a teacher at China University of Geosciences (Wuhan), depicts geologists working in different scenes including mineral exploration, collecting specimens and field study. The teacher has created 20 such drawings that gained wide attention in the university.

A pen and ink drawing by Chen Huawen, a teacher at China University of Geosciences (Wuhan), depicts geologists working in different scenes including mineral exploration, collecting specimens and field study. The teacher has created 20 such drawings that gained wide attention in the university.