求教怎么让 Avy 的 avy-goto-char-timer 支持中文？

[liuhui]

  (defun my/avy-goto-char-timer (&optional arg)
    (interactive "P")
    (let ((avy-all-windows (if arg
                               (not avy-all-windows)
                             avy-all-windows)))
      (avy-with avy-goto-char-timer
        (setq avy--old-cands (avy--read-candidates
                              'pinyinlib-build-regexp-string))
        (avy-process avy--old-cands)))))