When the US is busy bullying the world, China is seeking means to make more business partnerships. The good part about this Chinese policy is that African countries now have the chance of accessing the Chinese market. China has one of the biggest markets in the world, so smart African countries can create products and services that could be in high demand in China. Some African countries now know who their true friends are, so the propaganda against China is failing.
Chinese always they steadily focus on their growth or production or prefer to extend their relationship with other nations. China keep itself away from war or terror. Because they know it just create disturbance in both side economies. Whereas try to introduce such policies that encourage the investors or strengthening their economy. And this step of removing tax is one of this .
This step give benefit to both as African enriched in natural resources or China its self good in industry sector. China promote it's industry or it is a one more addition for it's exports. Removing terrif stimulate the economy of African as condition of its economy is below the standard. It can play the role increase their growth rate. On other side China get one customer more, for selling the product. Ethically a good way to enhance the boundary rather to impose the war on it. U.S in this regard is not doing good, imposing war created hatred among the nation for U.S. That's why China policy is based on wise approach