317计算公式简介：Lu Yuantao analyzed: When the Zen throne was in chaos, King Meng's eldest son died on the way. King Meng now has five sons and seven daughters, and only seven princesses are of the same age.
Lu Yuantao analyzed: When the Zen throne was in chaos, King Meng's eldest son died on the way. King Meng now has five sons and seven daughters, and only seven princesses are of the same age.
