Tuilaepa quoted a figure of $US4 billion and told local media several projects would be funded from grants and loans provided by the Chinese.
He said two new bridges would be built including a replacement for the Vaisigano bridge on Beach Road, next to Sheraton Aggie Greys hotel.
The other bridge would span the Mali'oli'o river at Samalaeulu in Savai'i.
Meanwhile, the Japanese government-funded reconstruction of the Apia wharf is due to be completed in June.
