The export quotas for tin, antimony, indium and silver have been retained and are unchanged for 2015, according to a statement posted on the Ministry of Commerce website on Thursday.
In previous years, the quotes for tungsten and molybdenum were announced at the same time as the other four metals.
China may cancel the quotas for the two metals as a follow up action after it lost an appeal at the World Trade Organization in August, analysts told Reuters.
The case was brought by the United States, the European Union and Japan to challenge China's restrictions on exports of rare earths, tungsten and molybdenum. China had argued that limits on the exports were needed to prevent over-mining and defended its policy as an essential part of its sustainable development.
In 2014, the quota for tungsten was 15,400 tonnes and for molybdenum was 25,000 tonnes. In 2015, the export quota for tin will stay at 17,000 tonnes and antimony at 59,400 tonnes while indium will continue at 231 tonnes and silver at 5,387 tonnes.
