Are Allen and Tao Hui really brother and sister?

No, according to Baidu Encyclopedia, Allen/Kloc-0 was born in Beijing in April 1983, a China film actor, graduated from the Performance Department of Beijing Film Academy, and Tao Hui/Kloc-0 was born in Zhuzhou, Hunan on April 25, 1986. I graduated from the China Classical Dance Affiliated High School of Guangzhou Dance School, and graduated from the Drama Performance Department of PLA Art College, majoring in applied psychology from the Psychology Department of Peking University.