Please find attached a photograph clearing showing the missing digit. According to Xu Yun, he was sad and regretful for the fact his mother died soon after giving birth to him (he probably later witnessed what women experience during pregnancy and birth) - and for the distress he caused his father by leaving home to become a Buddhist monk (without permission). This had all kinds of knock-on effects as although he was forced into marrying two young women (sisters) - he did not consummate the bond - or produce a son to carry-on the family name. Not producing a son was one of the worst things a dutiful son could NOT do with regard to his father (and by extension - his mother). In reality, it was a Confucian duty for an older son to produce an heir to inherit the family name and family wealth-business.