The Correction of Midface Volume Deficiency and/or Midface Contour Deficiency

Inclusion Criteria: * Age ≥ 26 (including 26 years old), male or female; * Subjects willing to correct midface volume deficiency and/or midface contour deficiency; * According to the assessment by the blinded evaluators, subjects must have mild to severe midface volume deficiency and/or midface contour deficiency on each side (MMVS grade of 2 to 4). It is not required for both sides to have the same MMVS grade, but the difference in MMVS grade between the two sides must be ≤ 1 grade; * Subjects are able to understand the objective of the study, voluntarily participate in the study and are willing to sign a written ICF. Exclusion Criteria: * Subjects who meet any of the following exclusion criteria will be ineligible for enrollment in the study: 1\. Subjects known to be allergic to hyaluronic acid products or to any component of the investigational medical device/control medical device; or subjects with a known history of severe allergies or anaphylactic shock. * Subjects showing abnormal coagulation mechanism (activated partial thromboplastin time (APTT) \>1.5 times the upper limit of normal) during the screening period, or those who have received any thrombolytic agent, anticoagulant or antiplatelet drugs (such as warfarin and aspirin) within 2 weeks before the screening. * Having tattoos, piercings, prominent facial hair, keloids, deformities, non-healed wounds, abscesses, granuloma, malignancies or precancerous lesions, malignant tumors, or skin mass of unknown natur…