Big Sky 帐篷，仅内置，尺寸：1P、1Plus、1.5P、2P：1P、1Plus、1.5P、2P 款式：网眼布、透气织物

If I own the Chinook 1p tent, does the 1p plus inner fit into this, and are all of the correct clip points in place, or do you need a 1p plus outer?

Yes, the Chinook 1Plus inner will fit the Chinook 1P outer. The Chinook 1P and 1Plus outer are the same so they can use either a Chinook 1P or a Chinook 1Plus inner.