First of all, the unique geographical location of Lanxi County makes it belong to Suihua City instead of Harbin. Although the county is close to Harbin, its special geographical position makes it not within the jurisdiction of Harbin.

Secondly, forcibly dividing Lanxi into Harbin may lead to administrative confusion and inconsistent development direction. Because Harbin, as the capital city of Heilongjiang Province, has a relatively perfect administrative system and economic development plan, while Lanxi and Zhaodong, as county-level administrative regions, have completely different administrative management and economic development plans from Harbin. If it is merged, it may increase the financial burden of Harbin, because after the merger, it needs to increase the investment in related infrastructure construction and social security, and the financial pressure is even greater.

To sum up, the main reason why Lanxi is not located in Harbin is its unique geographical location, which avoids administrative confusion and increases financial pressure.