Yes. Lin Dabao pretended to be dumb, but in fact, his martial arts were very strong. Although his martial arts were not as good as the four grandmasters, it was still considered to be above average. Moreover, he had successfully entered a certain realm from Level Nine and was only one step away from becoming a great grandmaster.

There were some conflicting information regarding whether Dabao knew martial arts in Joy of Life. Some documents indicated that Dabao possessed powerful martial arts and could fight four Great Grandmasters alone to save Fan Xian. Thus, it could be said that his martial arts were very high. However, there were also some documents that said that Da Bao did not know martial arts. He was a simple-minded person with a bad brain. Due to contradictions in the information provided, no definite answer could be obtained.
There were some conflicting information regarding whether Dabao knew martial arts in Joy of Life. Some documents indicated that Dabao possessed powerful martial arts and could fight four Great Grandmasters alone to save Fan Xian. Thus, it could be said that his martial arts were very high. However, there were also some documents that said that Da Bao did not know martial arts. He was a simple-minded person with a bad brain. Due to contradictions in the information provided, no definite answer could be obtained.
Lin Dabao had great martial arts skills in Joy of Life. Even though he appeared to be a fool, he was actually a character who hid his strength. Not only did Lin Dabao know martial arts, but his martial arts were peerless. He could even fight four Great Grandmasters to save Fan Xian. Therefore, it could be said that Lin Dabao's martial arts level was quite high.
The shadow's real body was not Lin Dabao. Although some people in the movie mistakenly thought that the Shadow was Lin Dabao, in reality, the Shadow's true identity was the son of the Dongyi City Lord and the younger brother of the Great Grandmaster Sigu Jian. Therefore, the shadow in Joy of Life was not Lin Dabao.
The shadow in Joy of Life was not Lin Dabao. Even though the Shadow's identity was set as Da Bao at the beginning of the play, the Shadow was actually a person of Dongyi, the younger brother of the number one expert in Dongyi, Sigu Jian. The Shadow chose to use Da Bao's identity as a fool to make people lower their guard against him so that they could complete their mission.
The shadow in Joy of Life was not Lin Dabao. Even though the Shadow's identity was set as Da Bao at the beginning of the play, the Shadow was actually a person of Dongyi, the younger brother of the number one expert in Dongyi, Sigu Jian. The Shadow chose to use Da Bao's identity as a fool to make people lower their guard against him so that they could complete their mission.
The shadow in Joy of Life was not Lin Dabao. Even though the Shadow's identity was set as Da Bao at the beginning of the play, the Shadow was actually a person of Dongyi, the younger brother of the number one expert in Dongyi, Sigu Jian. The Shadow chose to use Da Bao's identity as a fool to make people lower their guard against him so that they could complete their mission.
The shadow in Joy of Life was not Lin Dabao. Even though the Shadow's identity was set as Da Bao at the beginning of the play, the Shadow was actually a person of Dongyi, the younger brother of the number one expert in Dongyi, Sigu Jian. The Shadow chose to use Da Bao's identity as a fool to make people lower their guard against him so that they could complete their mission.
The shadow in Joy of Life was not Lin Dabao. Even though the Shadow's identity was set as Da Bao at the beginning of the play, the Shadow was actually a person of Dongyi, the younger brother of the number one expert in Dongyi, Sigu Jian. The Shadow chose to use Da Bao's identity as a fool to make people lower their guard against him so that they could complete their mission. Therefore, the shadow in Joy of Life was not Lin Dabao.
The shadow in Joy of Life was not Lin Dabao. Even though the Shadow's identity was set as Da Bao at the beginning of the play, the Shadow was actually a person of Dongyi, the younger brother of the number one expert in Dongyi, Sigu Jian. The Shadow chose to use Da Bao's identity as a fool to make people lower their guard against him so that they could complete their mission.