This is a multicenter, open-label phase Ib/II study of AK138D1 as monotherapy or in combination with ivonescimab in patients with advanced non-small cell lung cancer. The phase Ib portion is designed to evaluate the safety, tolerability, and preliminary antitumor activity of AK138D1 in combination with ivonescimab. The phase II portion is designed to evaluate the safety and efficacy of AK138D1 as monotherapy or in combination with ivonescimab.