markdown cannot generate ID for CJK characters in headings

For example, the following markdown document:

## Table of Contents
* [Title1](#标题一)
* [Title2](#标题二)

## 标题一

## 标题二

---

which rendered as the following

Table of Contents

• Title1
• Title2

标题一

标题二

---

The generated html for the last two headings will have ID properties with NO values.

As the "name" or "id" property is illegal in inline HTML tags, users are not able to create bookmarklet themselves. So it is quite inconvenient when you want to make a table of contents with CJK headings.