Visitors pose with a classic car during an exhibition of the Estoril Classics 2019 in Estoril, Portugal, on Oct. 12, 2019. The Estoril Classics 2019 is held here from Oct. 11 to 13, attracting enthusiasts from all corners of the world. (Photos: Xinhua)

Classic cars are displayed during an exhibition of the Estoril Classics 2019 in Estoril, Portugal, on Oct. 12, 2019. The Estoril Classics 2019 is held here from Oct. 11 to 13, attracting enthusiasts from all corners of the world.

Visitors pose with a classic car during an exhibition of the Estoril Classics 2019 in Estoril, Portugal, on Oct. 12, 2019. The Estoril Classics 2019 is held here from Oct. 11 to 13, attracting enthusiasts from all corners of the world.

A visitor takes pictures of a classic car during an exhibition of the Estoril Classics 2019 in Estoril, Portugal, on Oct. 12, 2019. The Estoril Classics 2019 is held here from Oct. 11 to 13, attracting enthusiasts from all corners of the world.