China's foreign trade maintained its upward momentum in the first eight months of this year, with exports and imports up 10.1 percent year on year, customs data showed Wednesday.

In the first eight months of this year, the country's total imports and exports rose to 27.3 trillion yuan ($3.91 trillion), data from the General Administration of Customs (GAC) showed.

Exports grew 14.2 percent year on year to 15.48 trillion yuan and imports increased by 5.2 percent to 11.82 trillion yuan. Meanwhile, China's trade surplus jumped 58.2 percent to 3.66 trillion yuan, official data showed.

In August alone, China's total foreign trade expanded 8.6 percent over the last year to 3.71 trillion yuan.

China's trade with all its major trade partners increased in the first eight months, according to the GAC. The Association of Southeast Asian Nations (ASEAN) remained China's largest trading partner, followed by the EU and the U.S., official data revealed.

China's trade value with ASEAN grew by 14 percent, with the EU by 9.5 percent and with the U.S. by 10.1 percent.

In the same period, China's imports and exports with countries along the Belt and Road routes jumped 20.2 percent to 8.77 trillion yuan.