Heilongjiang is a province with a rich food culture, among which cold noodles are one of the most popular local delicacies. Here are some cold noodle restaurants that may please you:

1. Harbin: Harbin is the capital city of Heilongjiang Province and the gourmet capital of Northeast China. In Harbin, you can taste a variety of delicious cold noodles, such as Harbin cold noodles, Northeastern big noodles, etc.

2. Qiqihar: Qiqihar is a prefecture-level city in Heilongjiang Province and the hometown of noodles in Northeast China. In Qiqihar, you can taste a variety of delicious cold noodles, such as Qiqihar barbecue noodles, Qiqihar cold noodles, etc.

3. Mudanjiang: Mudanjiang is a prefecture-level city in Heilongjiang Province and the gourmet capital of Northeast China. In Mudanjiang, you can taste a variety of delicious cold noodles, such as Mudanjiang cold noodles, Mudanjiang beef noodles, etc.

4. Jiamusi: Jiamusi is a prefecture-level city in Heilongjiang Province and the hometown of noodles in Northeast China. In Jiamusi, you can taste a variety of delicious cold noodles, such as Jiamusi barbecue noodles, Jiamusi cold noodles, etc.

To sum up, Heilongjiang Province is a province with rich food culture, and you can taste various delicious cold noodles everywhere.