According to Official Guinness Records,
The largest permanent 35mm cinema screen measures 34.6 m (113.5 ft) in length and 26.8 m (87.9 ft) in height, was achieved by Guangzhou Jinyi Media Corporation (China) in Suzhou, Jiangsu, China on 15 December 2015. The screen is displayed in a cinema in Suzhou, it took one month to produce the screen in South Korea, and the total overall area is 963.18 square metres.
For a complete list of 2015 records, please visit 2015 Guinness Records in China.