Chapter 197: What Is a Black-Hearted Tangyuan? "What's a black-hearted tangyuan?" Zhou Chengdong wasn't very familiar with internet slang. Before the third brother could explain, Liu Ziheng chimed in, "It means someone who's white on the outside and black on the inside. In short, not a good person." "Xiaoxi, why are you describing your second brother like that? What did he do?" Zhou Chengdong looked at the third brother in confusion. Zhou Chengxi looked at his eldest brother for a moment, then…