1. Enter: Changchun Real Estate Information Platform on Baidu, as shown in the following figure.
2. Select the second one: the government website of Changchun Housing Security and Real Estate Administration, and click to enter, as shown below.
3. After entering official website, select the third one for easy query, and click Enter, as shown in the figure below.
4. Select the second item in the left column: pre-sale permit inquiry, as shown in the following figure.
5, according to the page prompts, enter the required information, you can query, as shown in the figure below.