Pearl vs Shanghai

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A pearl is a hard, glistening object produced within the soft tissue (specifically the mantle) of a living shelled mollusk or another animal, such as fossil conulariids. Just like the shell of a mollusk, a pearl is composed of calcium carbonate (mainly aragonite or a mixture of aragonite and calcite) in minute crystalline form, which has deposited in concentric layers. The ideal pearl is perfectly round and smooth, but many other shapes, known as baroque pearls, can occur. The finest quality of natural pearls have been highly valued as gemstones and objects of beauty for many centuries. Because of this, pearl has become a metaphor for something rare, fine, admirable and valuable. The most valuable pearls occur spontaneously in the wild, but are extremely rare. These wild pearls are referred to as natural pearls. Cultured or farmed pearls from pearl oysters and freshwater mussels make up the majority of those currently sold.

Imitation pearls are also widely sold in inexpensive jewelry, but the quality of their iridescence is usually very poor and is easily distinguished from that of genuine pearls. Pearls have been harvested and cultivated primarily for use in jewelry, but in the past were also used to adorn clothing. They have also been crushed and used in cosmetics, medicines and paint formulations. Whether wild or cultured, gem-quality pearls are almost always nacreous and iridescent, like the interior of the shell that produces them. However, almost all species of shelled mollusks are capable of producing pearls (technically "calcareous concretions") of lesser shine or less spherical shape. Although these may also be legitimately referred to as "pearls" by gemological labs and also under U.S. Federal Trade Commission rules, and are formed in the same way, most of them have no value except as curiosities.

Source: Wikipedia

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Shanghai (Chinese: 上海, Shanghainese pronunciation: [zɑ̃̀.hɛ́] (listen), Standard Mandarin pronunciation: [ʂâŋ.xài] (listen)) is one of the four direct-administered municipalities of the People's Republic of China. It is under the direct administration of the State Council of China. The city is located on the southern estuary of the Yangtze, with the Huangpu River flowing through it. With a population of 24.28 million as of 2019, it is the most populous urban area in China and the second most populous city proper in the world. Shanghai is a global center for finance, technology, manufacturing, and transportation, and the Port of Shanghai is the world's busiest container port. Originally a fishing village and market town, Shanghai grew in importance in the 19th century due to trade and its favorable port location. The city was one of five treaty ports forced open to foreign trade after the First Opium War. The Shanghai International Settlement and the French Concession were subsequently established. The city then flourished, becoming a primary commercial and financial hub of the Asia-Pacific region in the 1930s. During the Second Sino-Japanese War, the city was the site of the major Battle of Shanghai. After the war, with the CPC takeover of mainland China in 1949, trade was limited to other socialist countries and the city's global influence declined. In the 1990s, economic reforms introduced by Deng Xiaoping resulted in an intense redevelopment of the city, especially the Pudong New Area, aiding the return of finance and foreign investment.

The city has since re-emerged as a hub for international trade and finance; it is the home of the Shanghai Stock Exchange, one of the largest stock exchanges in the world by market capitalization and the Shanghai Free-Trade Zone, the first free-trade zone in China. Shanghai is classified as an Alpha+(global first tier) city, making it one of the world's Top 10 major cities together with Hong Kong and Beijing in China by the Globalization and World Cities Research Network. Shanghai is a global financial center, ranking first in Asia and third globally (after New York and London) in the Global Financial Centres Index.Shanghai is an international center of research and development and is ranked 5th globally and 2nd in Asia (after Beijing which ranks 1st globally) by scientific research, as tracked by the Nature Index. The city is home to highly ranked institutions in Asia and the world such as Fudan University, Shanghai Jiao Tong University, Tongji University, and East China Normal University. Shanghai has been described as the "showpiece" of the booming economy of China. Featuring several architecture styles such as Art Deco and shikumen, the city is renowned for its Lujiazui skyline, museums and historic buildings—including the City God Temple, Yu Garden, the China Pavilion and buildings along the Bund. Shanghai is also known for its sugary cuisine, distinctive dialect and vibrant international flair. Every year, the city hosts numerous national and international events, including Shanghai Fashion Week, the Chinese Grand Prix and ChinaJoy.

Source: Wikipedia