diff --git a/hugegraph-core/pom.xml b/hugegraph-core/pom.xml
index c7a91e9c36..39aebc0c63 100644
--- a/hugegraph-core/pom.xml
+++ b/hugegraph-core/pom.xml
@@ -19,7 +19,7 @@
         <dependency>
             <groupId>com.baidu.hugegraph</groupId>
             <artifactId>hugegraph-common</artifactId>
-            <version>1.6.2</version>
+            <version>1.6.3</version>
         </dependency>
 
         <!-- tinkerpop -->
diff --git a/hugegraph-core/src/main/java/com/baidu/hugegraph/backend/serializer/BinarySerializer.java b/hugegraph-core/src/main/java/com/baidu/hugegraph/backend/serializer/BinarySerializer.java
index baadee43f4..37b6ac8fae 100644
--- a/hugegraph-core/src/main/java/com/baidu/hugegraph/backend/serializer/BinarySerializer.java
+++ b/hugegraph-core/src/main/java/com/baidu/hugegraph/backend/serializer/BinarySerializer.java
@@ -168,7 +168,7 @@ protected void parseProperty(Id pkeyId, byte[] val, HugeElement owner) {
         PropertyKey pkey = owner.graph().propertyKey(pkeyId);
 
         // Parse value
-        Object value = KryoUtil.fromKryo(val, pkey.clazz());
+        Object value = KryoUtil.fromKryo(val, pkey.implementClazz());
 
         // Set properties of vertex/edge
         if (pkey.cardinality() == Cardinality.SINGLE) {
diff --git a/hugegraph-core/src/main/java/com/baidu/hugegraph/backend/serializer/TableSerializer.java b/hugegraph-core/src/main/java/com/baidu/hugegraph/backend/serializer/TableSerializer.java
index 0115a91465..538de82792 100644
--- a/hugegraph-core/src/main/java/com/baidu/hugegraph/backend/serializer/TableSerializer.java
+++ b/hugegraph-core/src/main/java/com/baidu/hugegraph/backend/serializer/TableSerializer.java
@@ -96,7 +96,7 @@ protected void parseProperty(Id key, String colValue, HugeElement owner) {
         PropertyKey pkey = owner.graph().propertyKey(key);
 
         // Parse value
-        Object value = JsonUtil.fromJson(colValue, pkey.clazz());
+        Object value = JsonUtil.fromJson(colValue, pkey.implementClazz());
 
         // Set properties of vertex/edge
         if (pkey.cardinality() == Cardinality.SINGLE) {
diff --git a/hugegraph-core/src/main/java/com/baidu/hugegraph/backend/serializer/TextSerializer.java b/hugegraph-core/src/main/java/com/baidu/hugegraph/backend/serializer/TextSerializer.java
index 6ba192dcce..5fa34a8e1c 100644
--- a/hugegraph-core/src/main/java/com/baidu/hugegraph/backend/serializer/TextSerializer.java
+++ b/hugegraph-core/src/main/java/com/baidu/hugegraph/backend/serializer/TextSerializer.java
@@ -123,7 +123,7 @@ private void parseProperty(String colName, String colValue,
         PropertyKey pkey = owner.graph().propertyKey(readId(colParts[1]));
 
         // Parse value
-        Object value = JsonUtil.fromJson(colValue, pkey.clazz());
+        Object value = JsonUtil.fromJson(colValue, pkey.implementClazz());
 
         // Set properties of vertex/edge
         if (pkey.cardinality() == Cardinality.SINGLE) {
diff --git a/hugegraph-core/src/main/java/com/baidu/hugegraph/schema/PropertyKey.java b/hugegraph-core/src/main/java/com/baidu/hugegraph/schema/PropertyKey.java
index e0cbc41f65..47179aaecc 100644
--- a/hugegraph-core/src/main/java/com/baidu/hugegraph/schema/PropertyKey.java
+++ b/hugegraph-core/src/main/java/com/baidu/hugegraph/schema/PropertyKey.java
@@ -24,7 +24,6 @@
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.LinkedHashSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -84,7 +83,24 @@ public PropertyKey properties(Id... properties) {
         return this;
     }
 
-    public Class<?> clazz() {
+    public String clazz() {
+        String dataType = this.dataType().clazz().getSimpleName();
+        switch (this.cardinality) {
+            case SINGLE:
+                return dataType;
+            // A set of values: Set<DataType>
+            case SET:
+                return String.format("Set<%s>", dataType);
+            // A list of values: List<DataType>
+            case LIST:
+                return String.format("List<%s>", dataType);
+            default:
+                throw new AssertionError(String.format(
+                          "Unsupported cardinality: '%s'", this.cardinality));
+        }
+    }
+
+    public Class<?> implementClazz() {
         Class<?> cls;
         switch (this.cardinality) {
             case SINGLE:
@@ -96,7 +112,7 @@ public Class<?> clazz() {
                 break;
             // A list of values: List<DataType>
             case LIST:
-                cls = LinkedList.class;
+                cls = ArrayList.class;
                 break;
             default:
                 throw new AssertionError(String.format(
@@ -177,6 +193,16 @@ public <V> Object serialValue(V value) {
         return validValue;
     }
 
+    public <V> V validValueOrThrow(V value) {
+        V validValue = this.validValue(value);
+        E.checkArgument(validValue != null,
+                        "Invalid property value '%s' for key '%s', " +
+                        "expect a value of type %s, actual type %s",
+                        value, this.name(), this.clazz(),
+                        value.getClass().getSimpleName());
+        return validValue;
+    }
+
     public <V> V validValue(V value) {
         return this.convValue(value, true);
     }
diff --git a/hugegraph-core/src/main/java/com/baidu/hugegraph/structure/HugeElement.java b/hugegraph-core/src/main/java/com/baidu/hugegraph/structure/HugeElement.java
index 9992b7ee90..dec6ac1b47 100644
--- a/hugegraph-core/src/main/java/com/baidu/hugegraph/structure/HugeElement.java
+++ b/hugegraph-core/src/main/java/com/baidu/hugegraph/structure/HugeElement.java
@@ -213,24 +213,14 @@ private <V> HugeProperty<V> addProperty(PropertyKey pkey, V value,
             this.setProperty(property);
         }
 
-        Collection<V> values = null;
-        if (value instanceof Collection) {
-            values = (Collection<V>) value;
-        } else if (value.getClass().isArray()) {
-            values = CollectionUtil.toList(value);
-        }
-
-        if (values != null) {
-            E.checkArgument(pkey.checkDataType(values),
-                            "Invalid type of property values %s for key '%s'",
-                            value, pkey.name());
-            property.value().addAll(values);
+        Collection<V> values;
+        if (pkey.cardinality() == Cardinality.SET) {
+            values = CollectionUtil.toSet(value);
         } else {
-            E.checkArgument(pkey.checkDataType(value),
-                            "Invalid type of property value '%s' for key '%s'",
-                            value, pkey.name());
-            property.value().add(value);
+            assert pkey.cardinality() == Cardinality.LIST;
+            values = CollectionUtil.toList(value);
         }
+        property.value().addAll(pkey.validValueOrThrow(values));
 
         // Any better ways?
         return (HugeProperty) property;
diff --git a/hugegraph-core/src/main/java/com/baidu/hugegraph/structure/HugeProperty.java b/hugegraph-core/src/main/java/com/baidu/hugegraph/structure/HugeProperty.java
index cdaa484b99..7d6e2a427b 100644
--- a/hugegraph-core/src/main/java/com/baidu/hugegraph/structure/HugeProperty.java
+++ b/hugegraph-core/src/main/java/com/baidu/hugegraph/structure/HugeProperty.java
@@ -42,16 +42,7 @@ public HugeProperty(HugeElement owner, PropertyKey pkey, V value) {
 
         this.owner = owner;
         this.pkey = pkey;
-        this.value = pkey.validValue(value);
-
-        if (this.value == null) {
-            E.checkArgument(false,
-                            "Invalid property value '%s' for key '%s', " +
-                            "expect a value of type %s, actual type %s",
-                            value, pkey.name(),
-                            pkey.clazz().getSimpleName(),
-                            value.getClass().getSimpleName());
-        }
+        this.value = pkey.validValueOrThrow(value);
     }
 
     public PropertyKey propertyKey() {