In a paper published in Acta Mathematica Scientia, a research team from Shandong University, Tsinghua University, and Purdue University has made progress in bubbling analysis of a class of fourth-order geometric elliptic systems in the critical dimension. In their main result, they established the angular energy quantization for the inhomogeneous Lamm-Rivière system in four dimensions, with an inhomogeneous term merely in LlogL. This work provides critical insight in the mechanism of “bubble” formations and concentration-compactness phenomena for higher-order geometric variational problems.