WooCommerce Paypal snippet to convert checkout price with currency conversion rate. Written by: http://www.solagirl.net/

gistfile1.txt

add_filter('woocommerce_paypal_args', 'convert_rmb_to_usd');
function convert_rmb_to_usd($paypal_args){
    if ( $paypal_args['currency_code'] == 'RMB'){
        $convert_rate = 6.2116;
        $paypal_args['amount_1'] = round( $paypal_args['amount_1'] / $convert_rate, 2);
    }
    return $paypal_args;
}