China, Guangzhou
Let the school know you're thinking of applying — they can share their prerequisites and help you through the process.
It's best to ask — circumstances can change at any time.
Merchiston Academy Songshan Lake (MAS) opened in September 2021 and is presented on the school website as an international campus located in Songshan Lake Park, adjacent to Huawei's European Village; the site states the campus has about 35,000 m² of floor area and convenient transport links. MAS is described as offering courses within IGCSE and GCE A-level pathways and cooperating with Pearson/Edexcel and BTEC vocational provision for older students. The website also describes an on-site boarding provision and a broad co-curricular programme (sports, arts and STEM-related CCAs are listed). The school site does not publish a full fee schedule, an overall minimum/maximum age range for all entry points, typical class-size figures for MAS, or a total current pupil number; I can fetch the campus latitude/longitude from Google Maps if you'd like.