Abstract: Provided are a fibroblast activation protein inhibitor (FAPI) dimer compound, an FAPI dimer-based positron emission tomography (PET) imaging agent for tumor diagnosis, and a preparation method and use thereof. An amphiphilic polyethylene glycol (PEG) chain and a dimerized structure of FAPI in the FAPI dimer compound with a structure shown in formula I can improve the in vivo kinetic properties of the compound and prolong a residence time of the compound in a tumor, thereby improving the uptake and imaging effects in the tumor. The accurate tumor diagnosis can be achieved by labeling the FAPI dimer compound with a diagnostic nuclide (68Ga), which has promising application prospects in PET imaging for diagnosis and in the preparation of a therapeutic nuclide (such as 177Lu or 90Y)-labeled drug for treating a FAP-?-expressing tumor.

Abstract: An embodiment of the present invention relates to a wearable electronic device, relates to the field of wearable devices, and mainly aims to solve the technical problem of relatively poor wireless communication quality of a smart swatch. The following major technical scheme is adopted: a wearable electronic device comprises a wearing-side shell, a communication-side shell opposite to the wearing-side shell, and a circuit chip board. An accommodation space is formed between the wearing-side shell and the communication-side shell. A metal region of the communication-side shell serves as a metal antenna, and the metal antenna has a feeder terminal and a ground terminal.