zhspac­ing – Spac­ing for mixed CJK-English doc­u­ments in X∃TeX

The pack­age man­ages spac­ing in a CJK doc­u­ment; be­tween con­sec­u­tive Chi­nese let­ters, spaces are ig­nored, but a con­sis­tent space is in­serted be­tween Chi­nese text and English (or math­e­mat­ics).
The pack­age may be used by any doc­u­ment for­mat un­der X∃TeX.