The former head of China's top food processor and grain trader COFCO Group Ltd. has been appointed as the chairman of Sinochem Group, the country's fourth-largest oil company said on Jan. 5.

Ning Gaoning replaces long-serving Sinochem chief Liu Deshu, who is leaving due to reaching a government-set retirement age, Sinochem said, without giving further details.

Top jobs at major state-run enterprises such as Sinochem and COFCO are typically appointed by the government.

Sinochem Group, formerly the country's monopoly oil and chemicals trader until the early 1990s, has expanded into oil and gas production, refining, agriculture and real estate.

Analysts said the appointment of Ning, known for making acquisitions in the agricultural sector, could see Sinochem further expand its seed and fertilizer business as the oil and gas business faces seven-year low oil prices.

"Ning has restructured lots of domestic grain and food assets into COFCO and he would continue to play such a role in assets acquisition at Sinochem, particularly the seed and fertilizer business," said Ma Wenfeng, an analyst at Beijing Orient Agri-business Consultant.

Earlier, the state asset regulator named Zhao Shuanglian, former head of Sinograin, as the new chairman of COFCO. ($1 = 6.5219 Chinese yuan renminbi)