The project "is truly in the right lines and objectives of the World Bank which is to fight against poverty," said World Bank representative Ahmadou Moustapha Ndiaye. The U.N. official also praised the project.
However, critics say a more thorough evaluation of the contract still must be done.
"The Chinese contract was never a win-win ... It was badly negotiated," said civil society leader Jonas Tshiombela.
As part of the deal, China's Railway Engineering Corporation and Sinohydro Corp. are constructing about 3,000 kilometers of roads and railways in Congo. Universities, hospitals and health centers are also being built, according to the agreement.
Tshiombela said the quality of the construction work "leaves much to be desired." One road in the capital of Kinshasa — Sendwe Boulevard — already has potholes just a year after it was completed, he said.