How does sugar cube R switch back to Mandarin?

Go to my device page, and click timbre configuration.

Open Tmall Elf, app- Settings-Role Supermarket-Select to change the voice to bookboy voice and change it back to Mandarin.

Tmall elf Sugar R supports smart home control, voice shopping, mobile phone recharge, takeaway, audio music playback and other functions; Support schedule, reminder, alarm clock setting, weather query, mobile phone search, countdown, calorie query, news listening, constellation query, price query, stock query and other functions. Tmall Elf Sugar R adds two functions to experience the whole house scene: wake up nearby and multiple rooms. When there are many rooftop Tmall Elves at home, they will wake up the nearest Tmall Elves. On-demand a song, multi-room function supports multiple Tmall Elves in the whole house to play the same song.