5 unchanged sentences
The leases will expire on August 31, 2024. 
+Added: On September 23, 2021, LiqTech entered into a Lease Agreement through its wholly-owned subsidiary LiqTech Emission Control A/S, effective September 1, 2021, for a minimum term of eight years, and thereafter renewable upon six months’
+Added: notice, with Plainvim (Taicang) Industrial Park Co., Ltd., a company organized under the laws of the Republic of China, pursuant to which LiqTech agreed to lease 91,752 square feet of property located at No.
+Added: 525, Lingang South Road, Yuewang, Shaxi Town, Taicang City, Jiangsu Province, China.
+Added: The China property will be used primarily for the production, warehousing and storage of filtration supplies, products, and equipment and for ancillary office purposes.
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.