What is the palm like when the limbs are close together and the thumb is open in Wushu?

In martial arts, the limbs are close together and the thumb is open.

Bagua Palm, also known as Swimming Bagua Palm and Bagua Chain Palm, is a kind of traditional boxing in China, which mainly focuses on palm change and walking. It is a kind of traditional martial arts in China, and it is widely spread. There are five schools of Eight Diagrams Palm, which was founded in the late Qing Dynasty by Dong Haichuan, a native of Wen 'an County, Hebei Province. When traveling in Jiangnan, I was inspired by Taoist cultivation and combined with martial arts.