Ka mahi ia i roto i te whānuitanga o ngā pāpāho, ka waihangahia e Xu ngā whakaurunga e pā ana ki te ariā o te whakawhitiwhiti whakaaro mā te reo, e whakaatu ana me pēhea e taea ai te whakahaere i ngā tikanga me ngā kupu tuhituhi. I riro i a ia he pūtea MacArthur Foundation i te Hōngongoi 1999, i whakawhiwhia ki a ia mo "te taketake, te auaha, te whaiaro, me te kaha ki te whai wāhi nui ki te hapori, ina koa i roto i te tuhi me te tuhi tuhi". Pātai: He aha i riro ai i a Xu te pūtea MacArthur Foundation?
mō "te taketake, te auahatanga, te aronga whaiaro, me te kaha ki te whai wāhi nui ki te hapori,