How to use Internationalized human_time_diff() function in Chinese?

If you check out the source of human_time_diff:

if ( $diff < HOUR_IN_SECONDS ) {
    $mins = round( $diff / MINUTE_IN_SECONDS );
    if ( $mins <= 1 )
        $mins = 1;
    /* translators: min=minute */
    $since = sprintf( _n( '%s min', '%s mins', $mins ), $mins );
} elseif ( $diff < DAY_IN_SECONDS && $diff >= HOUR_IN_SECONDS ) {
    $hours = round( $diff / HOUR_IN_SECONDS );
    if ( $hours <= 1 )
        $hours = 1;
    $since = sprintf( _n( '%s hour', '%s hours', $hours ), $hours );
} elseif ( $diff < WEEK_IN_SECONDS && $diff >= DAY_IN_SECONDS ) {
    $days = round( $diff / DAY_IN_SECONDS );
    if ( $days <= 1 )
        $days = 1;
    $since = sprintf( _n( '%s day', '%s days', $days ), $days );
} elseif ( $diff < MONTH_IN_SECONDS && $diff >= WEEK_IN_SECONDS ) {
    $weeks = round( $diff / WEEK_IN_SECONDS );
    if ( $weeks <= 1 )
        $weeks = 1;
    $since = sprintf( _n( '%s week', '%s weeks', $weeks ), $weeks );
} elseif ( $diff < YEAR_IN_SECONDS && $diff >= MONTH_IN_SECONDS ) {
    $months = round( $diff / MONTH_IN_SECONDS );
    if ( $months <= 1 )
        $months = 1;
    $since = sprintf( _n( '%s month', '%s months', $months ), $months );
} elseif ( $diff >= YEAR_IN_SECONDS ) {
    $years = round( $diff / YEAR_IN_SECONDS );
    if ( $years <= 1 )
        $years = 1;
    $since = sprintf( _n( '%s year', '%s years', $years ), $years );
}

As you can see, just translate the %s min, %s mins etc. strings.