Some reforms of the early 1980s were, in effect, the implementation of a program that Chen had outlined in the mid-1950s. Chen called this the "birdcage economy (鸟笼经济/鳥籠經濟)". According to Chen, "the cage is the plan, and it may be large or small. But within the cage the bird [the economy] is free to fly as he wishes." Chen and some other conservative leaders including Li Xiannian never visited Shenzhen, the leading special economic zone championed by Deng. 1984–1993 During this period, Deng Xiaoping's policies continued beyond the initial reforms. Controls on private businesses and government intervention continued to decrease, notably in the agrifood sector which saw relaxation of price controls in 1985 and the establishment of the household responsibility system, and there was small-scale privatization of state enterprises which had become unviable. A notable development was the decentralization of state control, leaving local provincial leaders to experiment with ways to increase economic growth and privatize the state sector. Township and village enterprises, firms nominally owned by local governments but effectively private, began to gain market share at the expense of the state sector. With the help of Yuan Geng, the first joint-stock commercial bank in China, the China Merchants Bank, and the first joint-stock insurance company in China, the Ping An Insurance, were both established in Shekou. In May 1984, fourteen coastal cities in China including Shanghai, Guangzhou and Tianjin were named "Open Coastal Cities (沿海开放城市)". A significant economic debate during this period concerned the approach to price liberalization and whether China should adopt an approach consistent with shock therapy -- sudden price liberalization – or a more gradual approach. But in 1986, the latter approach won out. "Confronted with the diverse, authoritative warnings about the unforeseeable risks of imposing the shock of price reform and the uncertainty about its benefits," Premier Zhao Ziyang and the leadership ultimately rejected shock price reform. Zhao had accepted the argument that the basic concern in economic reform was energizing enterprises. By late summer, what started under the rubric of "coordinated comprehensive package reform" had been diluted to an adjustment in the price of steel (although its price was both important had carried symbolic weight) as well as partial tax and financial reform. Radical price reform again became a focus in 1988, and this time led to spiraling inflation (the first time it had done so since the 1940s) as well as a