v3.25.1
Property plant and equipment net (Details Narrative)
Dec. 31, 2024
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2023
CNY (¥)
Property Plant And Equipment, Net | $ $ 159,000   $ 168,000  
Property In Beijing, PRC Member        
Property Plant And Equipment, Net | $ $ 76,000   $ 80,000  
ZHEJIANG TIANLAN        
Bank loans | ¥   ¥ 777,000   ¥ 1,026,000
Property Plant And Equipment, Net | ¥   ¥ 57,738,000   ¥ 63,505,000