We warmly congratulate Mr. Xu Ouyang for his first-authored paper titled Polychromatic and polarized multilevel optical data storage accepted by Nanoscale. Prof. Yi Xu and Xiangping Li are joint corresponding authors of this paper. 

  This work is supported by National Key R\&D Program of China (YS2018YFB110012), National Natural Science Foundation of China (NSFC) (Grant Nos. 11674130, 91750110 and 61522504), Guangdong Provincial Innovation and Entrepreneurship Project (Grant 2016ZT06D081), the Natural Science Foundation of Guangdong Province, China (Grant Nos. 2016A030306016 and 2016TQ03X981) and the Pearl River Nova Program of Guangzhou (No. 201806010040).