Xiamen, which is partially comprehensible with Teochew although less so with Hainanese. Hokkien Chinese was a lingua franca among coastal Chinese and was also used by other ethnic groups such as the Malays and the Indians to communicate with Chinese before Mandarin came to dominance during the 1980s and 1990s. Just as in Taiwan, Hokkien people, speakers of Hokkien, refers not to people originating from all parts of Fujian. "Hokkien" refers only to the Minnan (Southern Min) region of southern coastal Fujian. Singaporean Hokkien does not include northern Fujianese such as those arriving from Fuzhou, Putian and so on. Early Hokkien migrants settled around Amoy Street and Telok Ayer Street, forming enclaves around the Thian Hock Kheng Temple. They subsequently set up clan headquarters (Hokkien Huey Kuan) there and later expanded to Hokkien Street and the vicinity of China Street. Hokkiens were the most active in early trading that centred along the Singapore River. As early settlers came from the southern coast of China, they were to pray for calm waves and a safe journey and worshipped the “Mother of Heavenly Sage” or Tian Shang Sheng Mu (), the Goddess who can calm the sea and ensure the safety of those travelling across the seas. Thian Hock Keng Temple was thus built in 1840 along Telok Ayer Street and dedicated to Tian Shang Sheng Mu (), it was a bustling meeting point and an important congregation point for the Hokkien community. Other popular deities are the Kew Ong Yah, Guan Teh Gong, Kuan Yim Hood Chor, Ong Yah Gong, Qing Shui Zhu Shi, Bao Sheng Da Di, Kai Zhang Sheng Wang, Fu De Zheng Shen and especially the Jade Emperor, 9th Day of the 1st Lunar Month is the birthday of Jade Emperor and is considered by many Chinese to be the most important day of the lunar year. A traditional Taoist practice by spiritual mediumship (乩童, p jītóng, Hokkien tâng-ki; 童乩) is also popular. The tangki goes into a trance and purportedly channels a chosen Deity for the petitioner. The Deity will provides wide range of divine assistance from bestowing blessings to oracles consultation to exorcism to giving spiritual protection and talismans. Teochew The Teochew-speaking subgroup in Singapore constitutes about a fifth of the Chinese Singaporean population, making them the second-largest Southern Min dialect-speaking group in Singapore. The Teochew speakers form a separate division of Hoklo (Min Nan/Hokkien) people.