Where is the link for the "compulsory course completion"

[gachiemchiep]

Hello @Evezerest in the last line of this notebook https://github.com/PaddleOCR-Community/Dive-into-OCR/blob/main/notebook_en/4.ppocr_system_strategy/ppocr_system_strategy.ipynb

5 Assignment
For specific content, see the Optimization Strategy Objective Questions and Optimization Strategy Practical Questions in the compulsory course completion.

Would you mind add missing link for the " compulsory course completion."