Happy Earth Day everyone! Chris reminisces about the very first Earth Day in 1970, Jiajia talks about magpies as good luck and both rhapsodize about the increased crane population in China.  

大家好，今天是地球日！克里斯回忆起1970年的第一个地球日，佳佳则谈到喜鹊象征着好运，两人都对中国的鹤类数量增加赞不绝口。