I purchased a POSTPAID (post-payment) package for passport processing services on the Chingumobile platform. The entire experience was very smooth and hassle-free. This service is not a traditional communication package; instead, it is an added value service jointly launched by Chingumobile and multiple qualified third-party professional document processing agencies. Users can enjoy the entire process of passport expedited appointment, material pre-review, real-time progress query, and one-on-one consultant guidance first. The relevant fees will be settled uniformly after the processing is completed based on the actual used service modules. For me, this POSTPAID model is particularly practical.