Farmer Shi Songbo from Henan Province tests a 23-meter-long, 10-meter-high airship replica. It cost him about 300,000 yuan ($46,939) to make. Photos: tech.qq.com

Zhang Wuyi from Hubei Province tests a 4.6-meter-long submarine that took him 25 days to make.

An F1-style racing car built by Zhejiang man Zhu Runqiang.

Chinese businessman Yang Zongfu stands in front of a Noah's Ark survival pod, which he spent two years and about 1.5 million yuan making. He says it will combat extreme weather and natural disasters.

Wang Jian, from Jiangsu Province, stands by his replica Lamborghini.

Yang Shijun from Jilin Province tests his homemade jet, which cost him about 100,000 yuan. The jet is five meters long, has a wingspan of 9.5 meters and weighs 110 kg.

A retired soldier named Jian Lin from Sichuan Province tests the homemade tank he made for his son as a special gift.