I can't. Nanju and Beizhi are two different plants belonging to Rutaceae, but Nanju belongs to citrus and Beizhi belongs to Fructus Aurantii. Their genes are different, so no matter how the environment changes, south orange can't become north orange, and north orange can't become south orange. The theory of "orange in the south and orange in the north" is a misunderstanding caused by the poor observation and lack of scientific verification of the ancients.