Economic trends in China's Gross Domestic Product over a 50 year period can be described as...

a gradual but steady decline in economic activity
relatively stable with low levels of economic activity from the 1950s to the 1990s
a gradual but steady increase in economic activity
initially stable with a drastic increase in economic activity starting in the late 1980s

a gradual but steady increase in economic activity

The economic trends in China's Gross Domestic Product (GDP) over a 50-year period can be described as a gradual but steady increase in economic activity. Initially stable with low levels of economic activity from the 1950s to the 1990s, China experienced a drastic increase in economic activity starting in the late 1980s. This growth continued steadily over the subsequent years, leading to a significant expansion of China's GDP.

To determine the economic trends in China's Gross Domestic Product (GDP) over a 50-year period, you would need to access the historical GDP data for China and analyze it. There are a few sources where you can find this information, such as government statistical agencies, international organizations like the World Bank or the International Monetary Fund, or reputable economic research institutions.

Once you have obtained the data, you can examine the trends. However, as an AI, I don't have real-time access to specific data or tailored knowledge of China's GDP over the past 50 years. I can, however, provide a general answer based on the typical economic trajectory of China during this period.

China's economic trends in terms of GDP over the past 50 years have been characterized by a gradual but steady increase in economic activity. China experienced a period of low economic activity from the 1950s to the 1970s due to political and economic factors that slowed down its development. However, starting from the late 1970s and especially in the late 1980s, China implemented economic reforms that led to significant growth in its economy.

These reforms, which included market-oriented policies and opening up to foreign trade and investment, resulted in a surge in economic activity and, consequently, a rapid increase in China's GDP. This trend has continued throughout the following decades, with China becoming one of the world's largest economies.

It's important to note that there may have been some fluctuations and variations in specific years or even shorter periods, depending on factors like global economic conditions and domestic policies. However, the overall pattern has been a steady increase in economic activity rather than a decline or low levels of stability.

To get the most accurate and up-to-date information on China's GDP trends over a 50-year period, it is recommended to consult official statistical sources or reputable economic research institutions that specialize in analyzing China's economy.