Generally speaking, this kind of folk agreement is supported by law, but first, typos will lead to ambiguity, so what does the share stand for? Second, the handwritten part generally needs to be stamped with the official seal or re-signed. Third, personally, since you are a shareholder, you need to change the shareholder information in the Industrial and Commercial Bureau. This agreement is really controversial. You are not a shareholder at all and have no say in the organization.