md_future_symbol returns all future symbols that provided by sina finance, see details on http://vip.stock.finance.sina.com.cn/quotes_service/view/qihuohangqing.html or http://vip.stock.finance.sina.com.cn/mkt/#global_qh)

md_future_symbol()

Examples

if (FALSE) {
sybs = md_future_symbol()
}