The key quote is from the central bank official Kingsley Moghalu,
“It was clear to us that the future of international economics and trade will shift in large part to business with and by China,” Moghalu said. “Ultimately the renminbi is likely to become a global convertible currency.”
When Nigerian central bankers see it, it is incredibly obvious. Small step but an eye on the future. China has a mess on its hands from its credit bubble, as does the rest of the world, but natural resource producers continue this slow and steady shift of more money into yuan. Nigerian exports of oil to the US have dropped in recent years due to the boom in US shale oil development. Nigeria also faces collapse or break up as ethnic fighting and religious battles rise. Their own people discuss the value of splitting the nation in two (Muslim vs. Christian), so making nice with a different potential patron is a great way to hedge bets for any coming conflict.