function click_round_number( $number, $min_value = 1000, $decimal = 1 ) {
    if( $number < $min_value ) {
        return $number;
    }
    $alphabets = array( 100000000 => '億', 10000 => '萬', 1000 => '千' );
    foreach( $alphabets as $key => $value )
    if( $number >= $key ) {
        return round( $number / $key, $decimal ) . '' . $value;
    }
}

{dede:field.click function="click_round_number(@me)"/}