Protecting intellectual property (IP) when sourcing from China can be challenging, but there are several steps e-commerce business owners can take to reduce the risk of IP infringement. Here are some strategies to consider:

1. Conduct Due Diligence: Before working with a supplier, conduct due diligence to ensure that they are a legitimate business and do not have a history of IP infringement. This can include researching the supplier online, asking for references, and checking their business license and registration.

2. Register Your IP: Register your trademarks, patents, and copyrights in China to gain legal protection and prevent others from using or copying your IP without permission. This can be done through the China National Intellectual Property Administration (CNIPA).

3. Include IP Provisions in Contracts: Include provisions in contracts with your suppliers that protect your IP, such as non-disclosure agreements (NDAs) and clauses that prohibit the supplier from using your IP without permission.

4. Conduct Inspections and Audits: Regularly inspect and audit your suppliers to ensure they are following your IP protection requirements and not infringing on your IP. This can include on-site inspections, product testing, and document reviews.

5. Work with a Third-Party Inspection Agency: Consider working with a third-party inspection agency to help monitor and enforce IP protection. These agencies can conduct inspections and audits on your behalf and provide legal support if necessary.

6. Monitor Online Marketplaces: Keep an eye on online marketplaces to ensure that your products are not being sold by unauthorized sellers or counterfeiters. You can use tools such as Alibaba's Intellectual Property Protection platform to report and remove infringing listings.

7. Use Watermarks and Unique Packaging: Consider using watermarks or unique packaging to make it harder for counterfeiters to copy your products. This can help to deter infringers and make it easier to identify counterfeit products.

8. Monitor Customs: Work with customs authorities to monitor incoming shipments and identify counterfeit products or goods infringing on your IP. Customs can seize infringing products at the border, preventing them from entering the market.

9. Conduct Training and Education: Train your employees and suppliers on the importance of IP protection and how to identify and report potential infringements. This can help to raise awareness and prevent accidental or intentional IP violations.

10. Seek Legal Assistance: If you suspect your IP has been infringed upon, seek legal assistance from a Chinese law firm specializing in IP protection. They can help you file a complaint with the appropriate authorities and pursue legal action against the infringer.

It's important to note that protecting intellectual property when sourcing from China can be complex and requires ongoing diligence. By taking a proactive approach and combining these strategies, you might reduce the risk of IP infringement and protect your valuable assets.