2 kilometers. According to Baidu map query, the distance from Harbin to Daqing is about 154.9 km to 2 km. The following are several common ways:

1. Self-driving: Driving from Harbin to Daqing, with a total mileage of about 154.9 kilometers, takes about 2 hours. You can choose to pass through Harbin-Dalian Expressway (G1) and other routes.

2. Trains: There are many trains between Harbin and Daqing, which takes about 2 hours for the fast train and 4 to 5 hours for the slow train. The specific time depends on the type of train and the driving route.

3. Long-distance buses: There are many long-distance buses from Harbin to Daqing, with a total distance of about 17 kilometers, which takes about 2 hours and 47 minutes.

4. High-speed rail: With the improvement of high-speed rail lines in the future, it will be more convenient to take the high-speed rail from Harbin to Daqing. At present, the high-speed railway between Harbin and Daqing has not been fully opened, but some sections have been opened to traffic.