(Yicai Global) Jan. 30 -- The central parity rate of the yuan against the greenback rose to a new six-month high today as China's central bank continues to push the currency higher. 

The China Foreign Exchange Trade System, the interbank trading and foreign exchange division of the People's Bank of China, set the rate at 6.7343 against the dollar, the strongest level since last July. The rate closed at 6.7356 yesterday.

The onshore yuan's spot rate traded at 6.7223 against the dollar this morning, compared with 6.7320 at the night trading close yesterday. The offshore spot exchange rate was 6.7404 compared with a close of 6.7485 overnight in New York.

In China's spot foreign exchange market, the yuan is allowed to rise or fall by two percent from the central parity rate each trading day.

The central parity rate of the yuan against the dollar is based on a weighted average of prices offered by market makers before the opening of the interbank market each business day.