Can I write my own calligraphy on WeChat?

Yes, but it's troublesome. First, write down the words you want to post on WeChat in your calligraphy and save them in your computer. Then, connect the computer with the mobile phone, and you can send your calligraphy words on WeChat. Another way is to take a photo of your calligraphy, save it in your mobile phone, and then send it to WeChat. I use the former more. If it is more than 25m, it must be sent to the Internet through Youku, and then sent to WeChat, which can be accompanied by music. I use Apple's tablet to play WeChat. I wish you success!