At Friday's press conference, China and Bulgaria also demonstrated how the two peoples are bonded together.

In the middle of the press conference, Li received from Borissov a Bulgarian national flag, on which the wife of well-known Bulgarian mountaineer Boyan Petrov wrote "His heart and noble spirits will never be frozen."

Petrov went missing two months ago while climbing Shishapangma Mountain in China's Tibet Autonomous Region. Upon hearing the news, the Chinese premier ordered an all-out effort to search and rescue him.

Petrov's wife expressed her gratitude to the premier and the Chinese government, and said, "My heart stays in China forever."

Li expressed his condolences, saying that Petrov showed the bravery of humankind.

China and the CEECs have attached great importance to people-to-people exchanges since the first China-CEEC summit was held in Warsaw in 2017.

Over the past six years, the number of Chinese citizens visiting the CEECs has increased more than fivefold. Now China and the CEECs record more than 1 million tourist trips between them every year.

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