CIPs is detected in path 1, but absent in path 2 samples. Although the CIPs are also observed in path 2 samples with the aging time increasing, its content difference always exists in both path samples. For example, for the Zn 2+ //F -//Na + //ClO4 -solutions with 0.04 mol•kg -1 ZnF2 prepared by paths 1 and 2, the solution prepared by path 1 contains the content of Zn 2+ -F -CIPs is higher than that prepared by path 2, with an average difference value of 0.35%, during 19 months aging times (Fig. ).