After the Chinese yuan joins the IMF's Special Drawing Rights basket, shares of the previous four currencies will decrease accordingly.

For example, the U.S. dollar's share will drop to 41.73 percent from nearly 42 percent. The euro's share will decrease to 30.93 percent from 37.4 percent. The yuan will rank the third with a proportion of 10.92 percent. Both the pound and the yen will shrink slightly to about eight percent.

China has been trying to join the SDR basket since 2009, but was rejected by the IMF in 2010 because it said the yuan was not a freely used currency.

After that, China made a concerted effort to internationalize its currency. It finally gained inclusion approval from the IMF last November and decided to officially join the basket as of tomorrow (Saturday).

Analysts say the yuan's inclusion will indirectly attract more overseas investment into China. The CEIC and HSBC say that foreign ownership of yuan assets has been recovering since March. Foreigners' holding of onshore bonds saw strong increases in June and August respectively.

The CEIC and HSBC added that after the yuan's full inclusion, foreigners' holding of onshore yuan could increase to 10 percent market value from the current 2 to 3 percent.