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+# picker
+
+### Introduction
+
+This sample shows how to use the **<picker\>** component to implement the common text picker, date picker, time picker, date and time picker, and multi-column text picker.
+
+### Usage
+
+In the sample, touch the text in each text box. The corresponding picker is displayed. Select any value from the picker and touch **OK**. The selected value is displayed in the text box.
+
+### Constraints
+
+This sample can only be run on standard-system devices.
diff --git a/UI/chart/README.md b/UI/chart/README.md
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+# chart
+
+### Introduction
+
+This sample shows how to use the **<chart\>** component to draw six types of charts: bar, line, gauge, loading, progress, and rainbow.
+
+### Usage
+
+The home screen of the sample displays six buttons. Touch a button to view the respective chart type.
+
+### Constraints
+
+This sample can only be run on standard-system devices.