Regional and supply-chain research

Road Bridge Materials Maintenance Keyword Candidate Study

Road Bridge Materials Maintenance Keyword Candidate Study. A dated 43-record cohort study compares composition, parent sets and evidence coverage. Comparative structure study; archive date 2026-10-16.

Revision and archive snapshot: 2026-10-16

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Research findings

Comparative structure study

The largest recorded reporting jurisdiction, Jiangsu, contains 7 records (16.3% of this 43-record cohort). The remaining cohort contains 36 records. The comparison concerns archive composition.

The recorded industry label Advanced equipment accounts for 48.8% here (21/43), compared with 25.5% in the parent set (4,918/19,297), an absolute gap of 23.4 percentage points.

14/43 companies link to pages with existing source-supported excerpts (32.6% of the cohort). The other 29 records remain usable for archive composition, but do not support new operating case studies.

3 keyword candidates match only a company name, with no matching term in recorded products or sub-industry fields. Product evidence is needed before treating these as operating businesses in this segment.

Company cohortDirectly linked pagesShare of public archiveArchive date
43430.2%2026-10-16

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

Comparable sets and compositional differences

The parent set, All public archive records, contains 19,297 records. This cohort contributes 43 (0.2%); 19,254 records remain after excluding it.

CategoryCohort count/baseReference: All public archive recordsGap (pp)Representation ratioRest count/base
industry · Advanced equipment21/43 · 48.8%4,918/19,297 · 25.5%+23.41.924,897/19,254
chain role · Advanced equipment and industrial automation / Process equipment and inspection instruments16/43 · 37.2%4,085/19,297 · 21.2%+16.01.764,069/19,254
sub-industry · Structural building materials7/43 · 16.3%81/19,297 · 0.4%+15.938.7874/19,254
sub-industry · Construction and heavy machinery7/43 · 16.3%187/19,297 · 1.0%+15.316.80180/19,254
industry · Advanced materials14/43 · 32.6%3,381/19,297 · 17.5%+15.01.863,367/19,254
chain role · Construction materials and infrastructure / Complete systems and use-case applications6/43 · 14.0%189/19,297 · 1.0%+13.014.25183/19,254
reporting jurisdiction · Hebei6/43 · 14.0%500/19,297 · 2.6%+11.45.39494/19,254
sub-industry · Special-purpose machinery5/43 · 11.6%433/19,297 · 2.2%+9.45.18428/19,254
reporting jurisdiction · Henan5/43 · 11.6%517/19,297 · 2.7%+8.94.34512/19,254
chain role · Advanced materials / Basic and process materials6/43 · 14.0%2,854/19,297 · 14.8%-0.80.942,848/19,254

Ratio of label participation, not market share; multi-label counts overlap.

Excluding this cohort, the recorded industry label Advanced equipment covers 4,897/19,254 remaining records (25.4%), an absolute gap of 23.4 percentage points from this cohort.

Concentration and cross-sectional structure

The full reporting jurisdiction distribution has 17 labels; the top 3 contain 18/43 records (41.9%).Other known labels contain 25 records.

For 43 records with known labels, the effective category count is 10.9, versus 17 actual labels. Definitions and scope are in the methodology.

The table shows ten labels; 7 others are included in the calculations above.

Recorded labelRecordsShare of cohort
Jiangsu716.3%
Hebei614.0%
Henan511.6%
Anhui49.3%
Shanghai37.0%
Shandong37.0%
Hubei37.0%
Fujian24.7%
Chongqing24.7%
Tianjin12.3%

Record counts do not rank supply capability or economic size.

The largest intersection, Jiangsu × Advanced materials, contains 5 records, or 71.4% of the 7 records carrying the Jiangsu label.

reporting jurisdictionindustryIntersection recordsCohort share
JiangsuAdvanced materials511.6%
HenanAdvanced equipment49.3%
HebeiAdvanced materials37.0%
HebeiAdvanced equipment37.0%
AnhuiAdvanced equipment24.7%
ShandongAdvanced equipment24.7%
JiangsuAdvanced equipment24.7%
HubeiAdvanced equipment24.7%

A cell contains company IDs carrying both labels. It does not establish procurement, supply or investment relationships between firms. Multi-label cells may overlap.

This page displays 8 of the full cross-tab’s 27 non-empty cells; the other 19 remain in the analysis.

Evidence coverage and strength of conclusions

Record fieldNon-empty/cohortCompletion
Company name43/43100.0%
reporting jurisdiction43/43100.0%
industry43/43100.0%
Recorded products43/43100.0%
sub-industry43/43100.0%
Chain labels43/43100.0%

Non-empty fields are not necessarily accurate or supported by originals.

Scope of source supportCount
Profiles with source-supported excerpts14
Distinct corresponding companies14
Reviewed Chinese/English paragraph pairs14

Counts concern existing reviewed bilingual excerpts, not re-certification of originals or entire reports.

Transparent rule reminderRecordsCohort share
Contains registration-narrative wording12.3%

A rule hit prioritises review; it does not establish that the entire field is wrong. One record can trigger several rules.

Matched fieldCandidatesCohort share
Company name37.0%
Recorded products3683.7%
Sub-industry511.6%

An ID may match several fields, so counts may exceed the cohort total. Matches establish search relevance only.

Among the translated non-broad query terms, “bridges” has the most matches: 37/43. Name, product and sub-industry fields match 2, 31 and 5 records respectively; the largest field is product field. Fields can overlap, and a term remains a search link rather than verified business activity.

Selected query termCandidates/shareName matchesProduct fieldSub-industry
bridges37 · 86.0%2315

Selected broad terms and specific segment terms, not the full query. Terms and fields can overlap and must not be summed. Counts show lexical sensitivity; no records are removed without primary evidence.

3 candidates match only a name, or lose all product-field matches after the full company name is removed while sub-industry also has no hit. This transparent string test locates copied company descriptions; it does not establish that a company does not operate the business.

Intersection with 2026 local lists

9 of this cohort’s 43 records link through existing company-ID mappings to 2026 lists from all jurisdictions (20.9%). This intersection measures list linkage, not successful recognition or company growth.

Observation setList recordsNew-applicant recordsReview recordsMapped company IDs
National list records linked to this cohort’s IDs9099

List rows and company IDs are separate counts, not new firms or final recognition.

Stored 2026 local-recommendation records, sources and stage definitions

Recorded roles and delivery checks

Traditional materials require product and manufacturing checks

The Structural building materials label covers 7 records (16.3% of this cohort). This archive clue raises a verification question about Defined building products or production equipment with quality documents; it does not establish that these companies already deliver it.

Delivery framework, stages and original sources

Related studies and shared records

Shared records with Prefabricated Steel Structure Components Keyword Candidate Study: 9; records in this cohort but outside that set: 34. The intersection/union ratio is 10.2%, a measure of label overlap rather than business collaboration. Read comparison

Shared records with Construction materials and infrastructure / Basic and process materials Supply-chain Study: 4; records in this cohort but outside that set: 39. The intersection/union ratio is 4.4%, a measure of label overlap rather than business collaboration. Read comparison

Company samples and record links

CompanyJurisdictionRecorded industry
Anhui Changjiang Fasteners Co., Ltd.AnhuiAdvanced equipment
Shangde Technology (Anhui) Co., Ltd.AnhuiAdvanced materials
China Railway Heavy Industry Co., Ltd.HubeiAdvanced equipment
Fujian Hongguan ROAD & BRIDGE ANTI-CORROSIVE Technology Co., Ltd.FujianAdvanced chemicals
Jiangsu GREAT Hoisting Machinery Co., Ltd.JiangsuAdvanced equipment
Hunan Yuandong Magnetoelectric High-Tech Co., Ltd.HunanAdvanced materials
Shandong Boyoun Heavy Industries Co., Ltd.ShandongAdvanced equipment
Shenzhen Qiyu Innovation Technology Co., Ltd.ShenzhenNext-generation information technology

Stable-ID samples, not rankings; metrics use the full cohort.

Directly related profiles and reports

Methodology

Read ID deduplication, comparison, batch and evidence definitions