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I've lowered(and changed) the bars on what "Confucian" means to the following:
The entire bureaucracy(government officials, police, fireman, etc) all wears uniforms
The suffrage policy is based around passing the civil examination(or a non-financial assessment)
The lower class is prohibited from wearing certain clothes/doing certain things that the "uppers" may enjoy.
They do not need to be influenced by China, and this policy should be enforced for more than a century.
POD is in the Renaissance Era and this policy must be implemented before 1900.
Have fun.