BEIJING, Oct. 19 (Xinhua) -- The ruling parties of Vietnam, Laos, Cuba and the Democratic People's Republic of Korea (DPRK) have sent their congratulations to the Communist Party of China (CPC) on the 19th CPC National Congress.

In its congratulatory letter, the Central Committee of the Communist Party of Vietnam (CPV) said that on behalf of the CPV and the Vietnamese people, it would like to extend the warmest congratulations to their Chinese counterparts on the important occasion.

The letter noted that in recent years, the Chinese people have made tremendous achievements under the leadership of the CPC Central Committee with Xi Jinping as the core.

It added that the CPV Central Committee believes that the 19th CPC National Congress will make important decisions that will firmly lead the Chinese people to complete the building of a moderately prosperous society on the 100th anniversary of the party's founding and turn China into a modern socialist country that is prosperous, strong, democratic, culturally advanced and harmonious on the centenary of the founding of the People's Republic of China.

Recalling the traditional friendship between the two parties and between the countries, the letter said the Vietnamese side stands ready to join hands with the Chinese side to constantly consolidate bilateral relations under the principles of long-term stability, future-orientation, good neighborliness and comprehensive cooperation and in the spirit of good neighbors, good friends, good comrades and good partners.

The Central Committee of the Lao People's Revolutionary Party (LPRP), for its part, noted that since its birth in 1921, the CPC has shown firm leadership, pioneered in innovation, and gone through important turning points in China's history.

In particular, during the past five years after the 18th CPC National Congress, under the leadership of the CPC Central Committee with Xi as the core, the Chinese people have gained huge and comprehensive achievements in defending, constructing and developing their nation, the letter said.

Speaking highly of Xi's leadership, the LPRP said it firmly believes that the CPC, the Chinese government and Chinese people will definitely make greater achievements and successfully realize the CPC's grand blueprint and its historical missions.

The Lao side, it added, cherishes the traditional friendship with China, and will continue to work with the Chinese side to deepen their partnership and contribute to the welfare of the two peoples as well as global peace, cooperation and development.

In its message, the Central Committee of the Communist Party of Cuba noted that since the 18th CPC National Congress, China has achieved great development under the leadership of the CPC and emerged as one of the leading countries in the world.

It added that the CPC has also enhanced party building, developed science, promoted social harmony, fought against corruption and developed socialism with Chinese characteristics.

The Cuban side, it said, is satisfied with the development of bilateral ties after Havana and Beijing established diplomatic relations 57 years ago and is willing to continue developing and enriching this relationship.

While extending its congratulations, the Central Committee of the Workers' Party of Korea (WPK), the DPRK's ruling party, said that for a long time, under the correct leadership of the CPC, the Chinese people have achieved a huge success in developing socialism with Chinese characteristics, and the WPK is glad about it.

The WPK Central Committee, added the letter, sincerely wishes the 19th CPC National Congress a great success.