Take Taobao as an example. If you have already placed an order, you cannot add a message. It is recommended to contact the seller through Aliwangwang to indicate special reminders or other needs, and keep the Aliwangwang chat records, which can be used as a basis if there is a transaction dispute later. If you did not fill in the buyer's message when purchasing the product, and want to add a message or modify the previous message content, you can go to the "Purchased Products" page to find the corresponding transaction and view the "Order Details" before making an Alipay payment. On the "Order Details" page, directly "Add Message" and click "Confirm".

Taobao is the largest online retail and business district in the Asia-Pacific region. It was founded by Alibaba Group in May 2003. Taobao is China's most popular online shopping retail platform, with nearly 500 million registered users and more than 60 million regular visitors every day. At the same time, the number of online products per day has exceeded 800 million, and an average of 48,000 products are sold every minute.