Loading mini-wubi rules is lazy,unless you first time toggled the mini-wubi input method. you can treat it as a minor mode,called by mini-wubi-mode, or treat it as a input method, called by toggle-input-method.

(add-to-list 'load-path "path/to/mini-wubi")
(require 'mini-wubi)
(setq default-input-method "mini-wubi")

quail provided a good utility to remap physical keyborad layout to standard Qwerty keyborad. I use dvorak layout for daily code typing,when I want to type some Chinese characters,I found it is annoying to switch layout between Dvorak and Qwerty,even my keyborad is able to switch layouts in a single one keypress,I don’t use Dvorak layout to typing Wubi,I consider changing the layout is unreasonable,so here is my setting for those people stick with my side.

(add-to-list 'quail-keyboard-layout-alist
             (cons "dvorak" (concat "                              "
                                    "  1!2@3#4$5%6^7&8*9(0)[{]}`~  "
                                    "  '\",<.>pPyYfFgGcCrRlL/?=+    "
                                    "  aAoOeEuUiIdDhHtTnNsS-_\\|    "
                                    "  ;:qQjJkKxXbBmMwWvVzZ        "
                                    "                              ")))
(quail-set-keyboard-layout "dvorak")

make test