diff --git a/sql/schema_v1.0.51_base.sql b/sql/schema_v1.0.51_base.sql
index 67c56e3..ac9b95b 100644
--- a/sql/schema_v1.0.51_base.sql
+++ b/sql/schema_v1.0.51_base.sql
@@ -179,6 +179,7 @@ CREATE TABLE IF NOT EXISTS `social_accounts` (
     `is_active`    TINYINT(1)   NOT NULL DEFAULT 1 COMMENT '有效 0/1',
     `is_incomplete`TINYINT(1)   NOT NULL DEFAULT 0 COMMENT '完整度标记',
     `created_at`   DATE DEFAULT NULL COMMENT '创建日期',
+    `updated_at`   DATE DEFAULT NULL COMMENT '更新日期',
     PRIMARY KEY (`id`),
     KEY `idx_owner` (`owner_type`, `owner_id`),
     KEY `idx_platform` (`platform`),
@@ -201,6 +202,7 @@ CREATE TABLE IF NOT EXISTS `media_commercial_attributes` (
     `media_remark`   TEXT DEFAULT NULL COMMENT '评估备注',
     `is_incomplete`  TINYINT(1)   NOT NULL DEFAULT 0 COMMENT '完整度标记',
     `created_at`     DATE DEFAULT NULL COMMENT '创建日期',
+    `updated_at`     DATE DEFAULT NULL COMMENT '更新日期',
     PRIMARY KEY (`id`),
     UNIQUE KEY `uk_social_account` (`social_account_id`),
     KEY `idx_incomplete` (`is_incomplete`)
@@ -361,19 +363,20 @@ CREATE TABLE IF NOT EXISTS `company_certifications` (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='企业资质认证表';
 
 CREATE TABLE IF NOT EXISTS `company_relations` (
-    `id`                INT UNSIGNED NOT NULL AUTO_INCREMENT,
-    `company_id`        INT UNSIGNED DEFAULT NULL COMMENT '企业A',
-    `related_company_id` INT UNSIGNED DEFAULT NULL COMMENT '关联企业B',
-    `related_company_name` VARCHAR(191) DEFAULT NULL COMMENT '关联企业名称',
-    `relation_type`     VARCHAR(50)  DEFAULT NULL COMMENT '关系类型',
-    `established_date`  DATE DEFAULT NULL COMMENT '关系建立日期',
-    `note`              VARCHAR(255) DEFAULT NULL COMMENT '备注',
-    `is_active`         TINYINT(1)   NOT NULL DEFAULT 1 COMMENT '有效 0/1',
-    `created_at`        DATE DEFAULT NULL COMMENT '创建日期',
-    `updated_at`        DATE DEFAULT NULL COMMENT '更新日期',
+    `id`                  INT UNSIGNED NOT NULL AUTO_INCREMENT,
+    `parent_company_id`   INT UNSIGNED DEFAULT NULL COMMENT '母公司（企业A）',
+    `child_company_id`    INT UNSIGNED DEFAULT NULL COMMENT '子公司/关联企业（企业B）',
+    `relation_type`       VARCHAR(50)  DEFAULT NULL COMMENT '关系类型（投资/控股/关联等）',
+    `is_direct`           TINYINT(1)   DEFAULT NULL COMMENT '是否直接持股/直接关系 1/0',
+    `ownership_percentage` DECIMAL(6,2) DEFAULT NULL COMMENT '持股比例%',
+    `established_date`    DATE DEFAULT NULL COMMENT '关系建立日期',
+    `note`                VARCHAR(255) DEFAULT NULL COMMENT '备注',
+    `is_active`           TINYINT(1)   NOT NULL DEFAULT 1 COMMENT '有效 0/1',
+    `created_at`          DATE DEFAULT NULL COMMENT '创建日期',
+    `updated_at`          DATE DEFAULT NULL COMMENT '更新日期',
     PRIMARY KEY (`id`),
-    KEY `idx_company` (`company_id`),
-    KEY `idx_related` (`related_company_id`)
+    KEY `idx_parent` (`parent_company_id`),
+    KEY `idx_child` (`child_company_id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='企业关联关系表';
 
 -- ------------------------------------------------------------
@@ -510,17 +513,14 @@ CREATE TABLE IF NOT EXISTS `schema_versions` (
 -- ------------------------------------------------------------
 CREATE TABLE IF NOT EXISTS `document_links` (
     `id`          INT UNSIGNED NOT NULL AUTO_INCREMENT,
-    `company_id`  INT UNSIGNED DEFAULT NULL COMMENT '关联企业',
-    `doc_name`    VARCHAR(255) DEFAULT NULL COMMENT '文档名称',
-    `url`         VARCHAR(500) DEFAULT NULL COMMENT '链接',
-    `file_type`   VARCHAR(30)  DEFAULT NULL COMMENT '类型',
-    `source`      VARCHAR(100) DEFAULT NULL COMMENT '来源',
-    `publish_date` DATE DEFAULT NULL COMMENT '发布日期',
-    `created_at`  DATETIME DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+    `document_id` INT UNSIGNED NOT NULL COMMENT '关联文档（company_documents.id）',
+    `owner_type`  VARCHAR(30)  NOT NULL DEFAULT 'company' COMMENT '拥有者类型（company/person/...）',
+    `owner_id`    INT UNSIGNED NOT NULL COMMENT '拥有者ID',
     `is_active`   TINYINT(1)   NOT NULL DEFAULT 1 COMMENT '有效 0/1',
+    `created_at`  DATETIME DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
     PRIMARY KEY (`id`),
-    KEY `idx_company` (`company_id`),
-    KEY `idx_active` (`is_active`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='文档链接表';
+    KEY `idx_owner` (`owner_type`, `owner_id`),
+    KEY `idx_doc` (`document_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='文档归属链接表';
 
 SET FOREIGN_KEY_CHECKS = 1;
\ No newline at end of file