During his five-nation Africa tour last week, Chinese Foreign Minister Wang Yi did not focus much attention on the ongoing debt crisis in the handful of countries on the continent that have borrowed heavily from Chinese creditors. That was very disappointing to some observers, including Gyude Moore, the former Liberian public works minister who’s now a senior policy fellow at the Center for Global Development in Washington, D.C.

Moore periodically publishes thought-provoking short essays on Twitter about China-Africa relations, and on Monday he called on China to do more to help alleviate the ongoing economic crisis in Africa and to “step up” on the issue of debt.