Wang declined to answer directly when asked if China thought Assad should remain in power or step down.
"China's position is very clear. We believe Syria's future, its national system, including its leadership, should be decided and set by the people of Syria," he said.
"China's role on the Syrian issue is to promote peace and negotiations ... China hopes to see peaceful, stable and developing Middle East," Wang added.
China has played host to both Syrian government and opposition figures before, though it remains a peripheral diplomatic player in the crisis.
While relying on the region for oil supplies, China tends to leave Middle Eastern diplomacy to the other permanent members of the U.N. Security Council, namely the United States, Britain, France and Russia.
China has its own security concerns in Syria, though it has not joined in the bombing of Islamic State.
"China believes that any and all efforts to combat terrorism should be respected and supported," Wang said.
China has expressed concern that Uighurs, a mostly Muslim people from western China's Xinjiang, have ended up in Syria and Iraq fighting for militant groups there.