ESG is shifting from 'voluntary disclosure' to a 'hard cross-border constraint'. Petrochemicals formally enter the national ETS in 2027, with the carbon price up from ¥48/t at 2021 launch to ~¥90/t in 2026; in parallel the EU CBAM enters its payment phase, internalizing carbon cost for exports such as natural, butadiene and synthetic rubber and lubricants. For SNSUC, rubber (natural/BR/synthetic) and lube/base oil are core categories, and carbon footprint has become a pre-order 'front-line question'.

In practice, base-oil carbon intensity has fallen to 1.7 tCO2e/t, and the platform pushes digital warrants carrying ESG carbon labels on-chain: beyond title hashes, each warrant additionally writes product-level carbon-footprint data so cross-border buyers verify with one click via a public explorer, without waiting for third-party audits. We argue that 2026–2027 will amplify a 'carbon label is credit' effect — ceteris paribus, labelled cargo can command a 1%–3% premium and shorter credit terms. Traders should treat the carbon label as a new re-export pricing factor and fold carbon intensity into counterparty and category risk ratings.