Since the first Qixi Christmas Tree was unveiled at the Chongqing People's Grand Hall Square in 2005, the annual Seven-Christmas Tree will bring infinite surprises to Chongqing citizens. At 19:00 on the evening of December 5 this year, Qixi Christmas Tree will also light up as scheduled at Yangjiaping Pedestrian Street. Do the fans of Qixi still remember the appearance of the Seven Christmas Tree in the past? Come on! Let us count the seven Christmas trees of the past years!
In 2008, Qixi Wishing Tree Lights Yangjiaping Square
This year's Seven-Happiness Christmas Wish Tree is made up of 100,000 seven-up bottles, up to 28 meters.
In 2007, Qixi Romantic Tree Lights Jiangbei Square
The Christmas tree is 27 meters high and is made up of 90,000 seven-key Christmas bottles.
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Asymmetric Thyristor is the abbreviation of thyristor, also known as silicon controlled rectifier, formerly referred to as thyristor; thyristor is PNPN four-layer semiconductor structure, it has three poles: anode, cathode and control pole; thyristor has silicon rectifier The characteristics of the parts can work under high voltage and high current conditions, and their working processes can be controlled and widely used in electronic circuits such as controlled rectifiers, AC voltage regulators, contactless electronic switches, inverters, and inverters.
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