Shanghai / Advanced materials / Basic and process materials Company Structure Study

Filter-difference study

Against the 139-record Shanghai / Advanced materials Company Structure Study, this 112-record cohort shares 99 records. Only 13 occur here and 40 only in the reference; the union contains 152. These are filter-membership differences, not company entries or exits.

An ID-deduplicated archive snapshot, not the whole market, current recognition or operating results.

The largest recorded sub-industry participation gap is for Advanced chemicals: 0/112 here versus 14/139 in the reference, an absolute difference of 10.1 percentage points. The cohorts have overlapping company IDs and are not independent samples.

Zero means no recorded label, not no business; multi-label cells overlap.

Multi-label counts can overlap; filter compliance is not industrial advantage.

Existing excerpts do not certify entire old reports; list linkage is not final recognition. Full definitions are on the series page.

The 2025 macro context for Shanghai uses a different denominator from this cohort.

Material delivery requires stable-production evidence

The Functional materials and advanced-material platforms label covers 10 records (8.9% of this cohort). This archive clue raises a verification question about Materials of defined composition and form with batch documents; it does not establish that these companies already deliver it.

Shared records with Shanghai / Advanced materials Company Structure Study: 99; records in this cohort but outside that set: 13. The intersection/union ratio is 65.1%, a measure of label overlap rather than business collaboration. Read comparison

Shared records with Shanghai / 4th batch Company Structure Study: 43; records in this cohort but outside that set: 69. The intersection/union ratio is 12.6%, a measure of label overlap rather than business collaboration. Read comparison