/**
 * Chinese text normalization for preProcess: converts Arabic digits and
 * common typographic forms into their spoken Chinese characters so the
 * downstream G2P (pinyin-pro) can read them.
 *
 * Outputs Han characters; works regardless of the surrounding text's
 * dialect, since pinyin-pro covers Mandarin readings.
 */
export declare function expandChineseText(text: string): string;