Parties and politicians of various countries have sent their congratulations on the opening of the 20th Communist Party of China National Congress, as they view the congress an important milestone of the CPC's history and providing solid guarantee for China's future development, Shen Beili, vice-minister of the International Department of the CPC Central Committee, said.The parties and politicians have praised highly the Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era, adding that the Thought has injected new vitality into the development of socialism and boosted developing countries' confidence in creating a better future for themselves, Shen said at a news conference on the sideline of the congress on Thursday.They also spoke positively of the accomplishment China has obtained in the new era, and expressed their expectations that the CPC will make even greater contributions to the world, Shen said.Parties and politicians of various countries have sent their congratulations on the opening of the 20th Communist Party of China National Congress, as they view the congress an important milestone of the CPC's history and providing solid guarantee for China's future development, Shen Beili, vice-minister of the International Department of the CPC Central Committee, said.The parties and politicians have praised highly the Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era, adding that the Thought has injected new vitality into the development of socialism and boosted developing countries' confidence in creating a better future for themselves, Shen said at a news conference on the sideline of the congress on Thursday.They also spoke positively of the accomplishment China has obtained in the new era, and expressed their expectations that the CPC will make even greater contributions to the world, Shen said.