Bluetooth selfie stick without lithium battery can be checked in or carried on. In the case of a Bluetooth selfie stick with a lithium battery, it can only be carried as carry-on baggage.
Passengers for personal use of portable electronic devices containing lithium batteries (cameras, cell phones, laptop computers, portable video cameras, etc.) can be carried on board as carry-on baggage, and lithium batteries with a rated energy value of not more than 100Wh (watt hours). Those exceeding 100Wh but not exceeding 160Wh can be loaded on the equipment in the delivery baggage or hand baggage with the approval of the airline. Lithium batteries exceeding 160Wh are strictly prohibited.
Other regulations on lithium batteries for airplanes.
Passengers carrying wheelchairs or other similar mobility devices powered by lithium batteries and portable medical electronic devices containing lithium batteries carried by passengers for medical purposes must carry them in accordance with the relevant regulations and requirements and be approved by the airline. Passengers may consult with the airline in advance for assistance.
According to the regulations of the Civil Aviation Administration of China (CAAC), lithium batteries carried on board must meet the relevant safety requirements, and travelers are advised to purchase lithium batteries from regular manufacturers through regular channels in order to avoid causing harm to themselves or others.
Reference to the above? State Administration of Civil Aviation - Security Screening