The glyph doesn't match the evidence. The glyph in the evidence is 栋.

The glyph in that version of the dictionary is wrong, but as can be seen from accompanying characters in the same phonetic series, 'luyện", 练 and 炼, the phonetic should be U+2B823 𫠣.

Here is updated evidence showing the correct form from the last published standard: Kho chữ Hán Nôm mã hoá.

kMandarin liàn

楝 (U+695D). Note: 𫠣 is an 二簡 form of 柬, so 楝 might also be considered a traditional variant of VN-F06D7