At the legal level, the institutional friction of
cross-border data regulation has exacerbated the risk
of technology implementation. Take, for example, the
conflict between the EU's General Data Protection
Regulation (GDPR) and China's Cybersecurity Law
and Data Security Law. The former requires that the
data export must be authenticated, or a standard
contract is signed, and indirect identifiers such as IP
addresses are included in the scope of personal data,
and at the same time, enterprises are forced to fulfil
the "right to be forgotten". The latter only defines
directly identifiable information as personal data and
does not establish a similar obligation to erase data.
In terms of penalties, the maximum fine set by the EU
can be 4% or 20 million euros of a company's global
turnover, while the upper limit set by China is 5% of
a company's revenue or 50 million yuan. Such
regulatory disparities have led to an exponential
increase in the cost of compliance for multinational
companies. A typical case shows that a global retail
giant failed to coordinate cross-border data rules
between China and the EU, resulting in a 14-month
delay in its blockchain supply chain project and a
direct economic loss of US$3.8 million, which was
listed by the European Commission as a typical
example of "regulatory conflict in the digital
economy" (Wang et al., 2022).
In view of the above-mentioned structural
contradictions, industry practice has formed a
technical solution for hierarchical alliance chains.
The architecture achieves a balance between
compliance and efficiency through a hierarchical data
processing mechanism, with core sensitive data (such
as financial information and customer privacy)
deployed on a private chain using zero-knowledge
proof technology, and non-sensitive business data
(such as logistics tracks) transmitted through the side
chain of the consortium chain (Zhang et al., 2021).
The middle layer relies on cross-chain protocols to
achieve data exchange, with a transaction throughput
of up to 1500 TPS, and integrates smart contracts to
automatically perform compliance verification.
Walmart China has achieved remarkable results in the
application of this solution: by separating the supply
chain data in China from the global supplier network,
it not only meets the requirements of China's
"Measures for Security Assessment of Cross-border
Data Transfer", but also realizes real-time data
sharing with suppliers in 23 countries, improving
inventory turnover efficiency by 28% and saving
more than US$12 million in annual operating costs.
According to Gartner's research report, such
hierarchical architecture has formed standardized
application templates in six industries, including
automobile manufacturing and FMCG, and promoted
the penetration rate of blockchain technology in the
supply chain to 21%, an increase of nearly 8
percentage points compared with the single-chain
architecture model
Another innovation is the "Dynamic Compliance
Engine", which automatically tracks regulatory
changes around the world. It has three core functions,
namely, real-time monitoring of new laws and
regulations issued by various countries; automatically
analyze the impact of these regulations on your
business; and adjust your data sharing strategy in less
than 15 minutes (Tian et al., 2020).
Its legal provisions can be recognized with an
accurate rate of 92.3%. With the system, Unilever has
reduced compliance audit time by 83% and reduced
disputes over data sharing by two-thirds.
The industry will continue to make breakthroughs
in several aspects. First, it is necessary to lower the
hardware threshold and strive to make ordinary
servers run nodes; Second, it is necessary to improve
the ability of compliance early warning, and it is best
to predict regulatory changes three months in
advance; Third, it is necessary to strengthen privacy
protection, so that "data can be used but cannot be
seen"; Finally, it is necessary to guard against future
quantum computer attacks (Kroger et al., 2021).
The industry predicts that by 2026, the application
cost will be reduced by more than half, and the
compliance efficiency will be increased by 70%, and
then the application of blockchain in the supply chain
field will truly usher in an explosion. Achieving this
goal will require technological companies,
businesses, and regulators to work together to
develop industry standards that are both safe and
practical.
5 CONCLUSION
The application value of blockchain technology in
supply chain management has been fully verified, but
it still faces multiple challenges in the actual
promotion process. After the final research, this paper
came up with the following findings. First of all, in
terms of data trustworthiness, after adopting
blockchain technology, the data fraud rate of its
suppliers is reduced, which is mainly due to the
characteristics of distributed ledgers, so that any data
tampering behavior will be detected immediately. In
terms of operational efficiency, the settlement time of
cross-border payments was reduced from an average
of 6 days to 3.5 hours through smart contracts.
However, when the number of nodes exceeds 80, the