Custom fields show in dashboard problem

I just added this code in function.php :

function my_woocommerce_edit_account_form() {

	$user_id = get_current_user_id();
	$user = get_userdata( $user_id );
	add_user_meta( $user_id, 'birthdate', $birthdate);

	if ( !$user )
		return;

	$description = get_user_meta( $user_id, 'description', true );
	$birthdate = get_user_meta( $user_id, 'birthdate', true );
	$testfield = get_user_meta( $user_id, 'testfield', true );

?>
	<fieldset>
		<legend>[:zh]嬰兒狀態[:en]Baby status[:ZH]婴儿状态[:]</legend>

		<p class="form-row form-row-thirds">

			<label for="description">[:zh]你有幾個孩子？[:en]How many kids do you have?[:ZH]你有几个孩子？[:]</label>

			<textarea name="description" id="description" style="font-family:sans-serif;font-size:1.2em;"><?php echo esc_attr( $description ); ?></textarea>

			<br />
			<span style="font-size: 12px;">([:zh]格式： 1歲男孩[:en]Format: 1 year old boy[:ZH]格式： 1岁男孩[:])</span>
		</p>

				<p class="form-row form-row-thirds">
			<label for="birthdate">Birth date:</label>
			<input type="text" name="birthdate" value="<?php echo esc_attr( $birthdate ); ?>" class="input-text" />
			<br />
			<span style="font-size: 12px;">(Birth date format: YYYY-MM-DD. eg: 1980-12-31)</span>
		</p>

			<p class="form-row form-row-thirds">
			<label for="testfield">Testfield:</label>
			<input type="text" name="testfield" value="<?php echo esc_attr( $testfield ); ?>" class="input-text" />
			<br />
		</p>

	</fieldset>

<?php

} // end func
 /**
 * This is to save user input into database
 * hook: woocommerce_save_account_details
 */
add_action( 'woocommerce_save_account_details', 'my_woocommerce_save_account_details' );

function my_woocommerce_save_account_details( $user_id ) {
	update_user_meta( $user_id, 'birthdate', htmlentities( $_POST[ 'birthdate' ] ) );
	update_user_meta( $user_id, 'description', htmlentities( $_POST[ 'description' ] ) );
	update_user_meta( $user_id, 'testfield', htmlentities( $_POST[ 'testfield' ] ) ); 

} // end func

It is totally. User can save it but I cannot see it in my dashboard. I want to know what’s the problem ? I want to show the filed in dashboard!
BTW: Is it workable for adding a picture custom field ?

https://wordpress.org/plugins/woocommerce/