Because I didn't see the consolidated report in the question, I can't elaborate. But the conceivable possibilities are:
1. The subsidiary is not controlled by the parent company for various reasons and is not included in the scope of merger, but is reflected through long-term equity investment. For example, the subsidiary is in liquidation stage.
2. Long-term equity investment is not the long-term equity investment in the consolidated statement, but the long-term equity investment of the parent company separately reflected in the consolidated statement.