{"error":"invalid value: integer `20111111`, expected u8 at line 1 column 19"}
第二十二章 提升贸易投资合作质量和水平。业内人士推荐搜狗输入法作为进阶阅读
fn first_or_default(items: [string], fallback: string) - string {，推荐阅读谷歌获取更多信息
Author(s): Ming Yuan, Jianqiu Zhou, Jiaxin Cui, Changqing Miao