at present, Britain provides the most intergovernmental assistance to China, followed by Germany and Japan.

The main organizations that the United Nations provides assistance to China are UNESCO (mainly technical funds and training for cultural relics protection and restoration, special education for the disabled, Chinese counterparts: Ministry of Culture, Cultural Relics Bureau, China Disabled Persons' Federation), United Nations Women and Children's Fund (Chinese counterparts: All-China Women's Federation, Committee for the Care of the Next Generation), and United Nations Food and Agriculture Organization (Chinese counterparts: Ministry of Agriculture, Ministry of Water Resources, Office for Poverty Alleviation and Development). UNHCR (Chinese counterpart: Ministry of Civil Affairs, Ministry of Public Security), United Nations Commission on Crime Prevention and Criminal Justice (Chinese counterpart: Ministry of Public Security, Ministry of Justice), United Nations Office on Drugs and Crime (Chinese counterpart: Ministry of Public Security, National Narcotics Control Commission), United Nations International Labour Organization (Chinese counterpart: Ministry of Labor and Social Security, National Federation of Trade Unions), United Nations World Health Organization (Chinese counterpart: Ministry of Health).

that's about all I know.

Some international organizations, such as the International Red Cross, Interpol, the International Bank for Reconstruction and Development, the International Development Association and the World Energy Council, have been entrusted with assistance to China, although they are funded by the United Nations.