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tokens: available.) CBP1 showed a lying J-shaped structure consisting of simple potential loops, while CBP2 looks like a minisigmoid structure composed of two evident sigmoidal strands (see Figures 1 (A)–(C)). A line-of-sight (LOS) magnetogram is displayed in Figure 1 (D) to show the magnetic field in the eruption source region, in which the white (black) patches represent positive (negative) polarities. The purple curve outlines the shape of CBP1, which connects opposite magnetic polarities of P1 (positive) and N1 (negative), while the green and orange curves outline the two strands of CBP2 linking opposite polarities of P2 (positive) to those of N2 (negative). It is noted that a negative magnetic polarity (N) was located in between P1 and N1. The overall eruption process can be divided into three stages: the formation of the first jet (jet1: 11:10 UT—11:30 UT), the interaction of jet1 with CBP2 (11:30 UT—11:37 UT), and the formation of the second jet (jet2: 11:37 UT—12:00 UT). In the following subsections, we discuss the eruption characteristics in association with those stages in more detail. 3.1. Formation of Jet1 and Its Interaction with CBP2 Figure 2 shows the formation of jet1 and its interaction with CBP2, in which the first, second, and third rows are XRT Al_Poly, AIA 211 Å, and AIA 171 Å time sequence images, respectively. In the bottom row, the left panel shows the magnetic flux variations (measured from the HMI LOS magnetograms) within the eruption source region of CBP1, while the right panel shows the corresponding relative intensity curve (measured from XRT Al_Poly, AIA 211 Å, and AIA 171 Å images) within the same region. The left column of Figure 2 shows CBP1 and jet1. The rising of the lying J-shaped CBP1 caused the collimated jet1, and the jet spire showed an obvious westward lateral sweeping motion as indicated by the arrows in Figures 2 (A) and (B). In the meantime, a bright patch around the eastern end of CBP1 appeared, which has a typical inverted-Y (or cusp) shape and can be regarded as the post-flare loop (PFL1) caused by the reconnection between CBP1 and its ambient open field lines (see the upward arrows in Figures 2 (A)–(I) and the inset in Figure 2 (G)). With an overall consideration of the appearance locations of the jet, PFL1, and the magnetic polarities as shown in Figure 1 (D), the magnetic reconnection should occur between CBP1 and the open field lines rooted in the negative magnetic region N, and this can also explain the westward lateral motion of the jet spire. From the EUV and soft X-ray intensity lightcurves in Figure 2 (K), one can identify that the start of jet1 was about 11:18 UT (see the vertical black line in each panel). For the magnetic flux variations (Figure 2 (J)), both the positive and absolute value of the negative magnetic fluxes showed obvious rising (decl.) before (after) the start of the jet. Such a variation pattern of the magnetic fluxes suggests the first emerging and then cancellation of the