diff --git a/src/main/java/mjkf/xinke/main/model/db/AsphaltDomestic.java b/src/main/java/mjkf/xinke/main/model/db/AsphaltDomestic.java
index 5715b70..640572c 100644
--- a/src/main/java/mjkf/xinke/main/model/db/AsphaltDomestic.java
+++ b/src/main/java/mjkf/xinke/main/model/db/AsphaltDomestic.java
@@ -57,10 +57,11 @@ public class AsphaltDomestic extends Model<AsphaltDomestic> {
     public AsphaltDomestic () {}
 
     public AsphaltDomestic (Row row) {
-        this.setName(row.getCell(0).getStringCellValue());
-        this.setPrice(BigDecimal.valueOf(row.getCell(1).getNumericCellValue()));
-        this.setDate(row.getCell(2).getLocalDateTimeCellValue().toLocalDate());
-        this.setFrom(row.getCell(3).getStringCellValue());
+        var policy = Row.MissingCellPolicy.CREATE_NULL_AS_BLANK;
+        this.setName(row.getCell(0, policy).getStringCellValue());
+        this.setPrice(BigDecimal.valueOf(row.getCell(1, policy).getNumericCellValue()));
+        this.setDate(row.getCell(2, policy).getLocalDateTimeCellValue().toLocalDate());
+        this.setFrom(row.getCell(3, policy).getStringCellValue());
     }
 
     public AsphaltDomestic update(AsphaltDomestic item) {
diff --git a/src/main/java/mjkf/xinke/main/model/db/SanmingSteel.java b/src/main/java/mjkf/xinke/main/model/db/SanmingSteel.java
index 0e62e08..c642b17 100644
--- a/src/main/java/mjkf/xinke/main/model/db/SanmingSteel.java
+++ b/src/main/java/mjkf/xinke/main/model/db/SanmingSteel.java
@@ -66,13 +66,14 @@ public class SanmingSteel extends Model<SanmingSteel> {
     public SanmingSteel () {}
 
     public SanmingSteel (Row row) {
+        var policy = Row.MissingCellPolicy.CREATE_NULL_AS_BLANK;
         row.getCell(1).setCellType(CellType.STRING);
-        this.setName(row.getCell(0).getStringCellValue());
-        this.setSpec(row.getCell(1).getStringCellValue());
-        this.setMaterial(row.getCell(2).getStringCellValue());
-        this.setPrice(BigDecimal.valueOf(row.getCell(3).getNumericCellValue()));
-        this.setFluctuating(BigDecimal.valueOf(row.getCell(4).getNumericCellValue()));
-        this.setDate(row.getCell(5).getLocalDateTimeCellValue().toLocalDate());
+        this.setName(row.getCell(0, policy).getStringCellValue());
+        this.setSpec(row.getCell(1, policy).getStringCellValue());
+        this.setMaterial(row.getCell(2, policy).getStringCellValue());
+        this.setPrice(BigDecimal.valueOf(row.getCell(3, policy).getNumericCellValue()));
+        this.setFluctuating(BigDecimal.valueOf(row.getCell(4, policy).getNumericCellValue()));
+        this.setDate(row.getCell(5, policy).getLocalDateTimeCellValue().toLocalDate());
     }
 
     public SanmingSteel update(SanmingSteel item) {
diff --git a/src/main/java/mjkf/xinke/main/model/db/SteelEntity.java b/src/main/java/mjkf/xinke/main/model/db/SteelEntity.java
index 6f520c9..48b1d7c 100644
--- a/src/main/java/mjkf/xinke/main/model/db/SteelEntity.java
+++ b/src/main/java/mjkf/xinke/main/model/db/SteelEntity.java
@@ -31,14 +31,15 @@ public class SteelEntity<T extends Model<?>> extends Model<T> {
     }
 
     public void fromRow(Row row) {
+        var policy = Row.MissingCellPolicy.CREATE_NULL_AS_BLANK;
         row.getCell(1).setCellType(CellType.STRING);
-        this.setName(row.getCell(0).getStringCellValue());
-        this.setSpec(row.getCell(1).getStringCellValue());
-        this.setMaterial(row.getCell(2).getStringCellValue());
-        this.setSource(row.getCell(3).getStringCellValue());
-        this.setPrice(BigDecimal.valueOf(row.getCell(4).getNumericCellValue()));
-        this.setFluctuating(BigDecimal.valueOf(row.getCell(5).getNumericCellValue()));
-        this.setDate(row.getCell(6).getLocalDateTimeCellValue().toLocalDate());
+        this.setName(row.getCell(0, policy).getStringCellValue());
+        this.setSpec(row.getCell(1, policy).getStringCellValue());
+        this.setMaterial(row.getCell(2, policy).getStringCellValue());
+        this.setSource(row.getCell(3, policy).getStringCellValue());
+        this.setPrice(BigDecimal.valueOf(row.getCell(4, policy).getNumericCellValue()));
+        this.setFluctuating(BigDecimal.valueOf(row.getCell(5, policy).getNumericCellValue()));
+        this.setDate(row.getCell(6, policy).getLocalDateTimeCellValue().toLocalDate());
     }
 
     public SteelEntity() {}