- Actinopterygii (/ˌæktɪnɒptəˈrɪdʒiaɪ/; from actino- ‘having rays’, and Ancient Greek πτέρυξ (ptérux) ‘wing, fins’), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of skin supported by radially extended thin bony spines called lepidotrichia, as opposed to the bulkier, fleshy lobed fins of the sister class Sarcopterygii (lobe-finned fish). Resembling folding fans, the actinopterygian fins can easily change shape and wetted area, providing superior thrust-to-weight ratios per movement compared to sarcopterygian and chondrichthyian fins. The fin rays attach directly to the proximal or basal skeletal elements, the radials, which represent the articulation between these fins and the internal skeleton (e.g., pelvic and pectoral girdles).
- National People’s Congress (Wikipedia)
The National People’s Congress (NPC) is the highest organ of state power of the People’s Republic of China. The NPC is the only branch of government in China, and per the principle of unified power, all state organs from the State Council to the Supreme People’s Court (SPC) are subservient to it. With 2,977 members in 2023, it is the largest legislative body in the world. The NPC is elected for a term of five years. It holds annual sessions every spring, usually lasting from 10 to 14 days, in the Great Hall of the People on the west side of Tiananmen Square in Beijing.