v3.25.2
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)
¥ in Thousands, $ in Thousands
 12 Months Ended
Apr. 30, 2019
Apr. 01, 2019
May 01, 2018
Dec. 31, 2024
USD ($)
SUPPLIER
CUSTOMER
Dec. 31, 2024
CNY (¥)
SUPPLIER
CUSTOMER
Dec. 31, 2023
CNY (¥)
SUPPLIER
CUSTOMER
Dec. 31, 2022
CNY (¥)
SUPPLIER
CUSTOMER
Dec. 31, 2024
JPY (¥)
Product Information [Line Items]                
Convenience translation rate         7.2993     7.2993
Deposits insured         ¥ 20,422,000 ¥ 22,854,000    
Interest rate, term deposits         4.72% 5.13%   4.72%
Gross profit       $ 28,886 ¥ 210,849,000 ¥ 204,649,000 ¥ 226,300,000  
Revenues (including related parties amounts of RMB 33,068, RMB 5,994 and RMB 1,377 for the years ended December 31,2020, 2021 and 2022, respectively)       78,578 573,566,000 571,024,000 593,634,000  
Research and development expenses       $ 24,249 177,000,000 222,538,000 326,513,000  
Advertising expenses         39,154,000 42,885,000 52,716,000  
Employee social benefits         ¥ 65,998,000 ¥ 86,198,000 ¥ 104,722,000  
Number of customers individually represent revenue | CUSTOMER       0 0 0 0  
Number of suppliers individually represent cost | SUPPLIER       1 1   1  
Number of customers individually represent accounts receivable | CUSTOMER       1 1   2  
Number of suppliers individually represent accounts payable | SUPPLIER       2 2 2    
Number of customers individually represent contract liabilities | CUSTOMER       0 0 1    
Number of supplier prepayments and other current assets | SUPPLIER       2 2 1    
Financial instruments amount         ¥ 1,285,000,000 ¥ 1,494,000,000    
Profit appropriation to statutory surplus fund         ¥ 0 ¥ 0    
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer [Member]                
Product Information [Line Items]                
Concentration risk percentage       10.00% 10.00% 10.00% 10.00%  
Purchases [Member] | Supplier Concentration Risk [Member] | Supplier One [Member]                
Product Information [Line Items]                
Concentration risk percentage       19.60% 19.60% 14.70% 11.10%  
Purchases [Member] | Supplier Concentration Risk [Member] | Supplier Two [Member]                
Product Information [Line Items]                
Concentration risk percentage           13.40%    
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer One [Member]                
Product Information [Line Items]                
Concentration risk percentage       16.60% 16.60% 15.40%    
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Two [Member]                
Product Information [Line Items]                
Concentration risk percentage           13.80%    
Accounts Payable [Member] | Supplier Concentration Risk [Member] | Supplier One [Member]                
Product Information [Line Items]                
Concentration risk percentage       13.30% 13.30% 14.70%    
Accounts Payable [Member] | Supplier Concentration Risk [Member] | Supplier Two [Member]                
Product Information [Line Items]                
Concentration risk percentage       12.40% 12.40% 11.30%    
Contract Liabilities [Member] | Customer Concentration Risk [Member] | Customer One [Member]                
Product Information [Line Items]                
Concentration risk percentage       10.00% 10.00% 10.20%    
Prepaid Expenses and Other Current Assets [Member] | Supplier Concentration Risk [Member] | Supplier One [Member]                
Product Information [Line Items]                
Concentration risk percentage       20.80% 20.80% 21.00%    
Prepaid Expenses and Other Current Assets [Member] | Supplier Concentration Risk [Member] | Supplier Two [Member]                
Product Information [Line Items]                
Concentration risk percentage       10.80% 10.80%      
Cloud Communication Services [Member]                
Product Information [Line Items]                
VAT rate   6.00% 6.00%          
Communication Devices Sales [Member]                
Product Information [Line Items]                
VAT rate 13.00% 16.00%            
Covering Communications Platform As Service [Member]                
Product Information [Line Items]                
Gross profit         ¥ 50,000,000 ¥ 69,000,000 ¥ 89,000,000  
Revenues (including related parties amounts of RMB 33,068, RMB 5,994 and RMB 1,377 for the years ended December 31,2020, 2021 and 2022, respectively)         ¥ 15,000,000 16,000,000 14,000,000  
Covering Communications Platform As Service [Member] | Minimum [Member]                
Product Information [Line Items]                
Length of service contracts       3 months 3 months      
Covering Communications Platform As Service [Member] | Maximum [Member]                
Product Information [Line Items]                
Length of service contracts       12 months 12 months      
CHINA                
Product Information [Line Items]                
Deposits insured         ¥ 500,000      
Revenues (including related parties amounts of RMB 33,068, RMB 5,994 and RMB 1,377 for the years ended December 31,2020, 2021 and 2022, respectively)         543,774,000 539,867,000 556,663,000  
JAPAN                
Product Information [Line Items]                
Deposits insured               ¥ 10,000
Revenues (including related parties amounts of RMB 33,068, RMB 5,994 and RMB 1,377 for the years ended December 31,2020, 2021 and 2022, respectively)         ¥ 29,792,000 ¥ 31,157,000 ¥ 36,971,000