Recently, cooperated with Researcher Qiu Xiaohui and Associate Researcher Liu Mengxi from National Nanocenter and Professor Shi Xingqiang from Hebei University, the ECUST research team of Professor Liu Peinian and Associate Professor Li Dengyuan realized the directional construction of LPs chain with high selectivity, and characterized its electronic properties in real space by controlling the surface [2+2] cycloaddition reaction through steric hindrance effect. The research article was published in the Journal of American Chemical Society in the form of newsletter.