To post a plan or any other type of document on Taobao, you need to make it into a physical product or provide related services. Here are some basic steps:

1. Register a Taobao seller account: If you don’t have a Taobao seller account, you need to register one first.

2. Open a store: After registering an account, open your own store according to Taobao’s requirements. You may need to provide some personal or corporate information for verification.

3. Make a product page: Create a new product page, upload the cover or related pictures of the plan, and describe the content and services of your plan in detail.

4. Set the price and purchase options: Determine the price of your plan, set a reasonable price, and provide purchase options, such as electronic download, paper mailing, etc.

5. Post the product: After confirming that the product information is correct, you can post the product. Make sure to comply with Taobao’s relevant rules and laws and regulations.

6. Promote the product: Promote your plan through social media, search engine optimization (SEO), Taobao platform advertising, etc.

7. Customer service and delivery: Once someone places an order, communicate with the customer in a timely manner and provide an electronic version of the plan or mail a paper version.

8. Pay attention to copyright issues: Before selling the plan, make sure you have the corresponding copyright or authorization to avoid infringing on the intellectual property rights of others.

Please note that if the plan contains sensitive information or is specific to a certain customer, it is not recommended to sell it on a public platform. In addition, if you provide customized planning services, you should clearly state the terms such as service scope, delivery time, and refund policy to protect the rights and interests of both buyers and sellers.