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Which organization made the four-color notes of the first-class builder?
It is organized by the online school of learning and thinking.

The four-color notes of the first-class builder were issued by Xuesisi College. Four-color notes, also known as Xueba cheats, are marked with colors, restored with high-definition pictures, and practiced on the spot. Knowledge combing test sites, test site recitation, exercise simulation, clever grading scheme and marking points are all available. Prepare for the exam in many ways, make every effort to build, learn more and practice more, and the results have soared.

Xueersi Online School is an online education platform for primary and secondary schools owned by companies listed on NYSE, which provides extracurricular teaching for children aged 6- 18. The number of students covers more than 200 cities across the country.