Civil Code Article 877 Reverse Engineering

Permissible Acquisition

Legal defense of reverse engineering starts with the requirement that the subject material must be acquired through a legitimate commercial transaction. This means the party performing the analysis must have clear title to the product, usually through an invoice or a sales contract from an authorized distributor. If the product was obtained through a breach of a non-disclosure agreement or by trespassing on a private facility, the entire process is tainted and the defense will fail.

The law treats the public sale of a product as an invitation for competitors to study its external features and its internal mechanics. This encourages manufacturers to protect their most sensitive secrets through patents or through physical designs that are difficult to disassemble. By limiting the defense to legally obtained goods, the statute prevents reverse engineering from becoming a cover for industrial espionage.

Technical Analysis

Operational phase of the process involves the systematic dismantling and testing of the product to deduce its manufacturing methods or its software logic. This work must be conducted independently, using only the information that can be extracted from the physical object itself. The law protects the right of a competitor to use their own engineering skills to replicate a function or a design, provided they do not use any secret documentation belonging to the original creator.

If a company uses a combination of reverse engineering and stolen data, the court will likely find that the trade secret has been infringed. The evidence of a clean room environment, where the engineers performing the analysis have no contact with the engineers designing the new product, is often used to prove the legitimacy of the process. This rigorous separation ensures that the new development is the result of the competitor’s own labor rather than a shortcut through misappropriated data.

Disclosure Boundary

Statutory right to analyze a product does not grant the right to publish or share the resulting technical data if doing so would violate other legal obligations. While a company may use the results of reverse engineering to design its own competing product, it cannot sell the resulting blueprints as a standalone information product. The defense is intended to support the development of new goods rather than the mass distribution of a rival’s secrets.

Furthermore, reverse engineering cannot be used to circumvent effective technological protection measures, such as encryption on software or hardware locks. In the Chinese context, the courts look closely at whether the reverse engineering was a genuine effort to understand a technology or a bad faith attempt to copy a brand. If the resulting product is a direct knockoff that confuses consumers, the company may still be liable for trademark infringement or unfair competition.

The defense is therefore a narrow path that requires careful legal and technical management.