Table:
text: China's Got Talent (series 1)
Series 1 Round Summary (Top 24)
Series 1 Round Summary (Top 24)
Name_Name_of_Act Ages Genre Act Hometown Semifinal_Week Position_Reached
Chen Jing 29 Singing and Performing Singer and Strength Act Huangpu , Shanghai 1 Semifinal
Chuan Zi and Dudu the dog 11-42 Singing and Performing Singing and Dog Howling Act Dongcheng , Beijing 1 Lost Judges` Choice, Semifinal
Dennis 25 Performing Male Pole Dancer Uzbekistan 1 Semifinal
Gao Yifeng 49 Singing Singer Hefei , Anhui 3 Semifinal
Jiang Renrui 45 Performing Peacock Dance Hulunbuir , Inner Mongolia 2 Semifinal
Old Buddies 41-52 Singing Band Dongcheng , Beijing 3 Semifinal
Power 22 Performing Acrobats Cangzhou , Hebei 2 Semifinal
Shenzhen Migrant Workers Hip-Hop Group 21-23 Dancing Hip Hop Dance troupe Shenzhen , Guangdong 1 Semifinal
Wenkexin Bellydancing Group 23 Dancing Balancing/Bellydancing Group Act Beijing 3 Semifinal

Question: How many cast members are 29 who made it to the semifinals of China's Got Talent (Series 1)?