People participate in a game to guess chocolate flavor during the 25th Eurochocolate in Perugia, Italy, on Oct. 19, 2018. The 25th international chocolate festival "Eurochocolate" kicked off on Friday in Perugia, an Italian city with a tradition of chocolate production. The annual festival offered a variety of activities including chocolate art displays, chocolate tasting, street performances and chocolate sculpting. (Xinhua/Cheng Tingting)

A worker cuts chocolate during the 25th Eurochocolate in Perugia, Italy, on Oct. 19, 2018. The 25th international chocolate festival "Eurochocolate" kicked off on Friday in Perugia, an Italian city with a tradition of chocolate production. The annual festival offered a variety of activities including chocolate art displays, chocolate tasting, street performances and chocolate sculpting. (Xinhua/Cheng Tingting)

A woman smiles in a chocolate-themed gift shop during the 25th Eurochocolate in Perugia, Italy, on Oct. 19, 2018. The 25th international chocolate festival "Eurochocolate" kicked off on Friday in Perugia, an Italian city with a tradition of chocolate production. The annual festival offered a variety of activities including chocolate art displays, chocolate tasting, street performances and chocolate sculpting. (Xinhua/Cheng Tingting)

A woman tastes chocolate during the 25th Eurochocolate in Perugia, Italy, on Oct. 19, 2018. The 25th international chocolate festival "Eurochocolate" kicked off on Friday in Perugia, an Italian city with a tradition of chocolate production. The annual festival offered a variety of activities including chocolate art displays, chocolate tasting, street performances and chocolate sculpting. (Xinhua/Cheng Tingting)

Visitors taste chocolate during the 25th Eurochocolate in Perugia, Italy, on Oct. 19, 2018. The 25th international chocolate festival "Eurochocolate" kicked off on Friday in Perugia, an Italian city with a tradition of chocolate production. The annual festival offered a variety of activities including chocolate art displays, chocolate tasting, street performances and chocolate sculpting. (Xinhua/Cheng Tingting)

Visitors look at chocolate products during the 25th Eurochocolate in Perugia, Italy, on Oct. 19, 2018. The 25th international chocolate festival "Eurochocolate" kicked off on Friday in Perugia, an Italian city with a tradition of chocolate production. The annual festival offered a variety of activities including chocolate art displays, chocolate tasting, street performances and chocolate sculpting. (Xinhua/Cheng Tingting)

Visitors look at chocolate products during the 25th Eurochocolate in Perugia, Italy, on Oct. 19, 2018. The 25th international chocolate festival "Eurochocolate" kicked off on Friday in Perugia, an Italian city with a tradition of chocolate production. The annual festival offered a variety of activities including chocolate art displays, chocolate tasting, street performances and chocolate sculpting. (Xinhua/Cheng Tingting)

Visitors look at chocolate products during the 25th Eurochocolate in Perugia, Italy, on Oct. 19, 2018. The 25th international chocolate festival "Eurochocolate" kicked off on Friday in Perugia, an Italian city with a tradition of chocolate production. The annual festival offered a variety of activities including chocolate art displays, chocolate tasting, street performances and chocolate sculpting. (Xinhua/Cheng Tingting)

A chocolate maker decorates chocolates during the 25th Eurochocolate in Perugia, Italy, on Oct. 19, 2018. The 25th international chocolate festival "Eurochocolate" kicked off on Friday in Perugia, an Italian city with a tradition of chocolate production. The annual festival offered a variety of activities including chocolate art displays, chocolate tasting, street performances and chocolate sculpting. (Xinhua/Cheng Tingting)