https://www.reuters.com/article/us-china-market-chinext/in-china-newly-listed-chinext-shares-surge-in-historic-reform-idUSKBN25K0BT >Shares of 18 companies surged on their ChiNext debut on Monday, kicking off a historic reform that will see Shenzhen officially challenge Shanghai for tech listings, while adding fuel to a "technology war" with the United States.