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The characteristic of static is quite important especially for the manipulator with force feedback. This paper aims to improve the traditional static model by considering the limitations such as lacking of versatility and ignoring gravity of links. For this purpose, a new asymmetric mass distribution method on the analysis of universal “force-sensing” model has been put forward to overcome the limitations.

Through the forces and torques analysis of every link and the moving platform, the static model of 3-RUU manipulator is acquired. Then, based on the physical meaning analysis of every part in the static model of 3-RUU manipulator, a new asymmetric mass distribution method on the analysis of universal “force-sensing” model can be obtained.

The correctness of the static model of 3-RUU manipulator is verified by simulation results based on Pro/Engineer software and Adams software. Furthermore, experiment results based on a manipulator similar to the Omega.3 manipulator indicate that the universal “force-sensing” model can be applicable to the above manipulator.

A new asymmetric mass distribution method on the analysis of universal static mathematical model has been put forward. Based on physical meaning of the above method, the “force-sensing” model can be established quickly and it owns versatility, which can be applicable to the 3-RUU manipulator, the Omega.3 parallel manipulator and other similar manipulators with force feedback. In addition, it can improve the accuracy of the “force-sensing” model to a great extent.

This study focuses on the use of guanxi by African returnees from China in Africa. It explains how returnees understood and leveraged guanxi to collaborate with Chinese partners.

This study uses semi-structured interviews to document how guanxi is increasingly extending beyond Chinese borders. It focuses on Ethiopia, Kenya and Tanzania and analyzes the returnees' mobilization of guanxi in Sino–African business contexts.

African returnees play an increasingly important role in guanxi internationalization in Africa. Returnees' understanding of guanxi is shaped by their African traditions and their Chinese experiences, creating their new cultural capital and a dynamic Sino–African business mindset.

This paper reveals an emerging shift in the business mindset among African returnees once initiated in guanxi. In addition, guanxi is increasingly practiced by African organizations.