Wang Weidong has been working in Pakistan since 2007 and is currently the chief surveyor for the Greater Karachi Bulk Water Supply Scheme K-IV project. Local employee Badan is Wang Weidong's most promising mentee.

The mentor and mentee operate advanced Chinese surveying equipment with a Beidou positioning system, earning them the nickname "Beidou mentor-mentee" among colleagues.

When Wang Weidong questioned Badan during surveying work and received satisfactory answers, Badan proudly boasted in Chinese, "My eyes are the ruler!" Wang Weidong always smiles with satisfaction, giving his mentee a thumbs-up. The mentor and mentee embody the concept of mutual learning.

Greater Karachi Bulk Water Supply Scheme K-IV project