The Lao leadership said in their congratulatory message that Vietnam's achievements were a source of encouragement. They also affirmed that Vietnam-Laos relations will be sustained through fluctuations in regional and world situations.

In his message, Chinese President Xi Jinping expressed high appreciation of Vietnam's achievements in recent years.He said China attached importance to developing relations with Vietnam, and was willing to work with Vietnam to promote the two-party and two-country relationship towards delivering practical benefits for the people of both countries.

Cambodian King Norodom Sihamoni said in his congratulatory message that he believed the bilateral relationship with Vietnam will continue to develop strongly with the motto of "good neighbors, traditional friendship, comprehensive cooperation, long-term sustainability".

Cuban leaders, for their part, expressed pride in the historic solidarity between the two countries and affirmed their desire to further promote the special ties of traditional friendship and comprehensive cooperation.

Russian President Vladimir Putin noted that Vietnam has achieved many successes in socio-economic development, demonstrated in the high prestige it enjoys in the international community. He emphasized that the comprehensive strategic partnership between Vietnam and Russia was constantly being consolidated in all fields and expressed his desire to strengthen bilateral cooperation in all areas.

North Korean leader Kim Jong-un said he believes that the traditional friendship between the two countries will continue to develop further in the coming time.

The Sultan of Brunei, Hassanal Bolkiah, affirmed that as the Association of Southeast Asian Nations (ASEAN) Chair in 2021, Brunei highly appreciates Vietnam's support as well as contributions to the regional bloc.

Indonesian President Joko Widodo said he believed that that the Independence Day spirit will give Vietnam fresh impetus to overcome the pandemic.

Malaysia's King Abdullah Ri'ayatuddin expressed his delight at the continuous expansion and development of bilateral relations over the past 40 years and believed that the two countries' relations would continue to prosper.

Thailand's King Maha Vajiralongorn was also pleased that bilateral relations continued to develop well despite facing challenges caused by the Covid-19 pandemic.

Singapore President Halimah Yacob said that the past year was a difficult one for the whole world because of Covid-19 but Vietnam and Singapore continued to stand together.

The U.S. Secretary of State, Antony Blinken, also sent National Day greetings, saying the U.S. looks forward to working closely with Vietnam to "build back better from the pandemic."

A Wednesday press statement on the U.S. Department of State’s website also quoted Blinken as saying: "The opening of the U.S. Centers for Disease Control and Prevention’s Regional Office for Southeast Asia in Hanoi provides a new platform to strengthen health security cooperation with Vietnam and the entire Indo-Pacific region."

The office was opened on August 25, during a three-day official visit to Vietnam by U.S. Vice President Kamala Harris.

The visits of Vice President Harris and Secretary of Defense Austin to Vietnam in late July have "reinforced the strength of the U.S.-Vietnam Comprehensive Partnership and our commitment to a strong, independent, and prosperous Vietnam," Blinken said.