ðɪs mˌaɪt biː bɪkˈʌz kɹˈaʊn pɹˈɪnsɛs hiː wʌz fɹʌm ɐ nˈoʊbəl fˈæmɪli, wˈɛɹæz ˈɛmpɹɛs dˈaʊɪdʒɚ lˈuːz lˈɪnɪɪdʒ wʌz kənsˈɪdɚd lˈoʊli.
This might be because Crown Princess He was from a noble family, whereas Empress Dowager Lu's lineage was considered lowly.