What brush does Li Shouyin use for official script?

What brush does Li Shouyin's official script use, which is both bold and handsome?

Li Shouyin is from Li Shouyu. Born in Xuzhou 1965 1 1 in June, Zhai Hao: Yihaitang, owner of Raindrop Building. Learn from Mr Gongda Yan. Member of China Calligraphers Association and Chairman of jiawang district Calligraphers Association. Now he is party member of China Democratic Progressive Party, member of the Standing Committee of the 10th National People's Congress in jiawang district, Xuzhou, and works in jiawang district Painting and Calligraphy Institute. Its official script is vigorous and fantastic. The structures alternate with each other, the size is interspersed, the length is uneven, each does his best, and the brushwork is round and muddy, without losing its beauty. If you send it late, you can keep this pen. The long front cleaves the knife, the pen is thirsty for ink, and it is full of interest. Linear astringency, ancient and clear gas. The pen path is like molten gold, dignified and smooth; Can also be like a leak in the house, straight and melodious, changing naturally. The body is square and round, which can be described as: vigorous and see flesh and blood, beautiful and charming.