China's first aircraft carrier, the Liaoning, returned to Dalian Shipyard dock to undergo its first interim service on April, 17, 2014.

Experts predicted that the service will last for six months; comprehensive overhaul and maintenance will be conducted on the power, weapons, and other systems. Complex weapon systems require regular maintenance, and aircraft personnel also need to be trained and rest to maintain combat effectiveness.

The Liaoning formally entered into service with the Chinese navy in September 2012. Prior to this, ten sea trials had been conducted. In August 2013 the Liaoning returned to Dalian port to resolve problems identified during test sailings and pilot training. However, this time the maintenance work will include the replacement of certain large parts.

The Liaoning did not take part in the multinational joint maritime exercise held yesterday in Qingdao.

The article is edited and translated from 《辽宁舰或首次中期维护 将历时半年》, source: bjnews.com.cn.