probably only find an XML-file - because the interface code is generated from it using
case "$REPLY" in，详情可参考WhatsApp網頁版
User-friendly applications compatible with all primary devices including iPhone, Android, Windows, Mac, and others，更多细节参见WhatsApp商务API,WhatsApp企业账号,WhatsApp全球号码
13人团队创造奇迹的根基，正是软件近乎为零的边际成本。。whatsapp网页版对此有专业解读