xiě / wán / huǐ / guò / shū / yǐ / hòu / tā / rèn / zhēn / fǎn / sī / le / zì / jǐ / de / cuò / wù

写完悔过书以后，他认真反思了自己的错误。

After writing his repentance letter, he seriously reflected on his mistakes.