Futures require ID cards not to be watermarked because: if the watermark blocks the text, the other party needs to manually input it to increase the cost and refuse to pass. Larger companies usually use the api of third-party authentication services such as Ali or Baidu. To put it bluntly, photo ocr recognition+partial customization is a third-party verification that conforms to ID rules. If the watermark blocks the text, it needs to be manually input by the other party, which increases the cost and cannot pass. Watermark must block text. You can make the color as light as possible, maybe it will pass.