Internal deduction method: fund income = unit net value on redemption date ××( 1- redemption rate)+dividend-investment amount, share = investment amount ×( 1- subscription rate) ÷ net value on subscription date+interest;

2. External deduction method: fund income = unit net value on redemption date ××( 1- redemption rate)+dividend-investment amount, share = investment amount ×( 1+ subscription rate)+unit net value on subscription date+interest.