XML 103 R87.htm IDEA: XBRL DOCUMENT v3.21.2
Taxation - Reconciliation of Difference Between the PRC Statutory Income Tax Rate and Effective Tax Rate (Detail)
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Income Tax Disclosure [Abstract]      
PRC Statutory tax rate 25.00% 25.00% 25.00%
Difference in EIT rates of certain subsidiaries (21.00%) (23.00%) (3.00%)
Permanent book - tax difference (2.00%) (1.00%) (5.00%)
Additional deduction for research and development expenditures 3.00% 1.00% 2.00%
Changes in valuation allowance (6.00%) (2.00%) (16.00%)
Effective tax rate (1.00%) 0.00% 3.00%