def change_order():
	order_id = request.json['order_id']
	quantity = request.json['quantity']
	price = request.json['price']
	cc = check_parameters(request.json)
	message = cc.change_order(order_id, quantity, price)
	logtext = log_handler(message, '改单')
	no_db_logger.info(logtext)
	return json.dumps(message, ensure_ascii=False)