The U.S. merchandise trade deficit with the People's Republic of China (China) remains a major source of bilateral tension. Some Members of Congress and other U.S. government officials often point to the bilateral trade imbalance as evidence that China is not competing fairly in the global market. In March 2018, the Trump Administration reportedly asked China to develop a plan to reduce the bilateral trade deficit by $100 billion. On March 31, 2017, President Trump issued Executive Order 13786, which states: Within 90 days of the date of this order, the Secretary of Commerce and the United States Trade Representative (USTR), in consultation with the Secretaries of State, the Treasury, Defense, Agriculture, and Homeland Security, and the heads of any other executive departments or agencies with relevant expertise, as determined by the Secretary of Commerce and the USTR, shall prepare and submit to the President an Omnibus Report on Significant Trade Deficits (Report). President Trump also issued Executive Order 13796, "Addressing Trade Agreement Violations and Abuses," on April 29, 2017, which, among other things, requires the Secretary of Commerce and the USTR to "conduct comprehensive performance reviews" of "all trade relations with countries governed by the rules of the World Trade Organization with which the United States does not have free trade agreements but with which the United States runs significant trade deficits in goods." China is one such country. Despite the priority the Trump Administration has placed on reducing bilateral trade deficits in general, and with China in particular, according to official U.S. trade statistics, the overall U.S. merchandise trade deficit and the bilateral deficit with China increased in 2017 and 2018. The overall deficit rose from $736.6 billion in 2016 to $795.7 billion in 2017, and $878.7 billion in 2018. The bilateral deficit with China accounted for 47.1%, 47.2%, and 47.7% of the total merchandise trade deficit for the last three years, respectively. Debate over this trade deficit is hampered by disagreement between the two countries on how large the deficit actually is. According to official U.S. figures, China has surpassed Canada as the largest supplier of U.S. imports, running up a bilateral merchandise trade surplus in 2018 of $419.2 billion. However, according to official Chinese figures, China's trade surplus with the United States in 2018 was $323.9 billion—$95.9 billion less than the U.S. figure (see Table 1 ). The U.S. trade deficit with China plays a role, directly and indirectly, in proposed legislation addressing bilateral trade relations. The Fair Trade with China Enforcement Act ( H.R. 704 and S. 2 ), for example, refers to "a severely imbalanced trading relationship" with China, and would impose restrictions on Chinese investment in the United States "due to its negative effect on the United States trade deficit and wages of workers in the United States." The United States Reciprocal Trade Act ( H.R. 764 ) finds, "The lack of reciprocity in tariff levels and nontariff barriers contributes to the large and growing United States trade deficit in goods, which is a drag on economic growth and undermines economic prosperity." The act would authorize the President to negotiate an agreement with a country that has higher tariff or nontariff barriers than the United States, or impose additional duties on that country's exports to the United States. Table 1 lists the official trade statistics from the United States and China for the years 2001 to 2018, using official trade data. From the U.S. perspective, its bilateral trade deficit with China more than quintupled in value over the last 18 years, from just over $83 billion in 2001 to over $419 billion in 2018. However, from the Chinese view, its bilateral trade surplus with the United States increased more than 11-fold, from about $28 billion in 2001 to more than $323 billion in 2018. Table 1 reveals that most of the discrepancy between the trade data from the two nations stems from significantly different figures for China's exports to the United States. The difference between the U.S. and Chinese figures for U.S. exports to China was generally less than $10 billion until 2011, but the discrepancy has been rising in recent years. China's figures for its exports to the United States differed from U.S. figures by $48.3 billion in 2001 and $61.1 billion in 2018. The most widely used international system for classifying traded goods is the Harmonized Commodity Description and Coding System, commonly referred to as the Harmonized System or simply HS Code. Every product traded is classified into a 10-digit code. The first two digits of the product's code correspond to one of the 98 HS "chapters," that classify all goods in general categories. The U.S. International Trade Commission maintains the U.S. version of the HS Code, officially called the "Harmonized Tariff Schedule of the United States," or HTS. Since both the United States and China use the same HS chapters, it is possible to compare the trade data at this level. Table 2 lists in rank order the top five HS chapters where the value of U.S. imports from China exceeds the value of Chinese exports to the United States for 2018. The top five HS chapters—footwear (64), machinery (84), electrical machinery (85), optical and medical instruments (90), and toys and sporting goods (95)—account for more than 94% of the difference between the U.S. and Chinese figures for U.S. imports from China (or Chinese exports to the United States). All five of these chapters also ranked high according to both countries in terms of their absolute value of trade. Machinery (84), electrical machinery (85), and toys and sporting goods (95) were among the top five ranked chapters in terms of the value of imports from China, according to the United States, and accounted for 54.7% of the total value of imports in 2018. The same three chapters were among the top five sources of exports to the United States, according to China, and accounted for 50.5% of the total value of exports in 2018. In addition, China's export value for four chapters exceeded U.S. import value by more than $1 billion (in order): Railway equipment (86) - $2.856 billion; knit apparel (61) - $2.840 billion; woven apparel (62) - $1.618 billion; and non-railway vehicles (87) - $1.130 billion. On the other side of the trade equation, there were 10 chapters where China's imports exceeded U.S. exports by more than $1 billion: miscellaneous grains (12); mineral fuel (27); pharmaceutical products (30); miscellaneous chemical products (38); plastic (39); precious stones and metals (71); machinery (84); electrical machinery (85); non-railway vehicles (87); and optical and medical equipment (90). In one chapter—railway equipment (86)—U.S. exports exceeded Chinese imports by more than $1 billion. On both sides of the trade balance equation, two of the greatest differences in the official trade statistics of the two nations occurred in the same HS chapters—machinery (84) and electrical machinery (85). The discrepancies between the official trade statistics for these two types of goods have been consistently large for flows in both directions since 2001, indicating a systemic difference in the evaluation of the bilateral trade of these goods. The question as to why China's official statistics (on trade flows) are routinely much lower in value than the official U.S. trade statistics has been and continues to be the subject of analysis by scholars, government officials, and other interested parties. Nor is the issue unique to the United States; Canada also reports bilateral trade statistics that differ significantly from China's reported figures, and has investigated the reasons for those differences. The following is a short review of some of the key explanations provided in this literature, categorized into "technical" and "non-technical" explanations. "Technical" explanations refer to procedural or administrative causes for the discrepancies; "non-technical" explanations include causes arising from non-procedural or non-administrative sources. In its official statistics, China evaluates exports using the more commonly used "free on board" (F.O.B.) terms, and evaluates imports using "cost, insurance, and freight" (C.I.F.) terms. The use of F.O.B. for exports and C.I.F. for imports is a common, but not universal, international practice. The United States, however, reports its exports using "free alongside" (F.A.S.) terms and values imports using a customs definition. As a result, official U.S. trade data place a lower value on both U.S. exports to China and imports from China than the official Chinese data. In addition, direct comparisons of the official U.S. and Chinese trade balances reported in the media are potentially misleading, because the goods trades are being evaluated using different methods. For more accurate direct comparisons, the trade data for both nations should be evaluated using the same terms. The United States includes Puerto Rico and the U.S. Virgin Islands in its trade data; China does not. China treats Puerto Rico and the U.S. Virgin Islands as separate customs territories. According to most studies, this is a comparatively minor source of difference in the trade figures. Because of the distance between China and the United States, it takes time between the export of the goods from China and their import in the United States. Goods in transit at the end of the year are counted as exports by China, but not as imports by the United States. However, the lag between shipments occurs at the beginning and the end of the year, thus minimizing the effect of timing on the overall trade balance difference. The current practice of U.S. Customs is to rely on the declaration of the importer to determine the country of origin. Some analysts believe that importers are misidentifying a significant amount of imports as Chinese. Because China's currency, the renminbi (RMB), is allowed to fluctuate within a small range, the exchange rate between the renminbi and the U.S. dollar changes over time. The value of a shipment may change between the date it leaves China and the date it arrives in the United States due to changes in the exchange rate. Although the renminbi has appreciated against the U.S. dollar over the last decade, exchange rate changes are generally not considered a major factor in the discrepancy in the trade figures. According to two joint China-U.S. studies (see " Joint China-U.S. Studies of Discrepancies " below), about half of the merchandise trade discrepancy between U.S. imports from China and Chinese exports to the United States—or eastbound trade—is attributable to changes in the values of the export price in China and the import value in the United States for goods shipped directly between the two countries. Part of the difference may be caused by mid-shipment transfers in ownership resulting in the new owner adding a markup in the price. Another possible explanation is intentional under-invoicing of exports (see below). Some analysts believe that Chinese importers may intentionally under-value imports from the United States to lower the import tariff due on the shipment. In addition, some analysts believe that Chinese exporters may intentionally under-value exports to the United States to maximize their net proceeds overseas for various tax and regulatory reasons. More recently, bilateral trade figures may have been distorted by "phantom goods" shipments from China to the United States (and other locations) used to disguise attempts to move financial capital offshore. Due to the "hidden nature" of under-invoicing, it is difficult to assess how much, if at all, this may be contributing to the differences in the trade data. Although estimates vary, many analysts agree that a large portion of China's exports arrive in the United States via a third party, Hong Kong being the most commonly identified location. The intermediation of shipments raises two sources of discrepancies. First, the exporter from China may not know that the goods eventually will be shipped to the United States, and may therefore list the third party (e.g., Hong Kong) as its destination, but U.S. Customs may list the source of shipment as being China, based on U.S. laws and regulations. Second, the value of the shipment may change—with or without any actual change in the goods—between its arrival in and departure from the third location. The joint China-U.S. study of discrepancies in merchandise trade statistics determined that value differences account for about half of the differences between Chinese and U.S. trade statistics. In April 2004, the 15 th JCCT established a statistical working group, with representatives of China's Ministry of Commerce and General Administration of Customs, and the U.S. Department of Commerce and Office of the USTR. The initial focus of the working group was to examine the "unusually large and growing statistical discrepancies in the bilateral merchandise trade data officially published by [the] two countries." The Working Group subsequently decided to conduct a reconciliation study to determine the causes of the discrepancies. However, the Working Group stated that the results of the study were not intended to imply errors in either nation's statistical systems and/or methods of calculating official merchandise trade data. Under the auspices of the U.S.-China Joint Commission on Commerce and Trade (JCCT), China's Ministry of Commerce and the U.S. Department of Commerce and Office of the U.S. Trade Representative (USTR) have conducted two studies to determine the causes of the statistical discrepancies in the official merchandise trade data reported by both nations. The first report was released in October 2009; the second in December 2012. The main conclusions of the two studies are largely the same. The greatest discrepancy is in the "eastbound trade" data, which accounts for 80%-90% of the overall difference in annual trade balance. Roughly half of the "eastbound trade" data discrepancy can be attributed to goods that "leave China, enter the commerce of intermediate countries or regions, and then [are] re-exported to the United States." The release of the official U.S. annual trade figures has been frequently followed by expressions of concern about the size of U.S. bilateral trade deficit with China. According to official U.S. trade figures, the bilateral trade deficit with China in 2017 was more than five times the size of the next largest bilateral trade deficit (Mexico, $71.1 billion) and greater than the sum of the next eight largest bilateral trade deficits. China has not accepted the "accuracy" of the official U.S. figure for the Sino-U.S. trade balance for at least two decades. A 1997 White Paper issued by China's State Council, "On Sino-US Trade Balance," states, "Statistics and analyses prove it true that Sino-US trade has been in favour of China in recent years, but it is obvious that the size of the US deficit has been largely exaggerated by the US side." In 2007, China's Foreign Ministry spokeswoman, Jiang Yu, said, "imbalances in China-U.S. trade are an objective fact, but this is also related to the two sides' different statistical methods." Also, when considering means or actions designed to reduce the U.S. trade deficit with China, it is useful to know which goods are the main sources of discrepancies between Chinese and U.S. trade figures, and how important they are in the overall trade flow between the two nations, so that "trade remedies" may be better targeted at the perceived problem. According to this report, the main problems appear to be in the trade figures for electrical machinery, machinery, and toys and sporting goods. For those causes of the differences resulting from data compilation—such as misidentification of value or country of origin of imports—Congress may choose through oversight or other means to encourage the responsible U.S. agency to examine and adjust its procedures for compiling trade data. In addition, Congress may decide to press or otherwise encourage China's customs services to conduct a similar review of its trade compilation procedures. In other cases, more detailed analysis of the trade data may be helpful in persuading China to amend or alter its laws, regulations, and policies pertaining to the import or export of goods to the United States. "Accounting for Discrepancies in Bilateral Trade: The Case of China, Hong Kong, and the United States," by Michael J. Ferrantino and Zhi Wang, China Economic Review , vol. 19 (2008), pp. 502-520. Adjusted Estimates of United States-China Bilateral Trade Balances—An Update . K.C. Fung, Lawrence J. Lau and Yangyan Xiong. June 2006. Stanford Center for International Development, Working Paper No. 278. Comparing Canada's and China's Bilateral Trade Data . China-Canada Joint Working Group on Trade Statistics Reconciliation. August 29, 2018. Methodology of U.S.-China-Hong Kong Triangular Merchandise Trade Statistic Reconciliation . Alexander Hammer, Lin Jones, and Zhi Wang. August 2013. Office of Economics Research Note, U.S. International Trade Commission, No. RN-2013-08A. Report on the Statistical Discrepancy of Merchandise Trade Between the United States and China, Report by the Joint Commission on Commerce and Trade Statistical Working Group, October 2009. The Second Phase Report on the Statistical Discrepancy of Merchandise Trade between the United States and China , Report by the Joint Commission on Commerce and Trade Statistical Working Group, December 2012. Statistical Differences in Sino-US Trade Balance . February 12, 2007. China Online. http://chinaculture.about.com/library/china/whitepaper/blstrade2.htm . The U.S.-China Bilateral Trade Balance: Its Size and Determinants . Robert C. Feenstra, Wen Hai, Wing T. Woo, and Shunli Yao. May 1998. Paper presented at the UNDP-HIID Conference on China's Integration in the Global Economy, January 17, 1998. The U.S.-China Trade Imbalance: How Big Is It Really? Sarah Y. Tong. March 2005. China: An International Journal. Volume 3, No. 1, pp. 131-154.

Summary: The size of the U.S. bilateral trade deficit with China has been and continues to be an important issue in bilateral trade relations. President Trump and some Members of Congress view the deficit as a sign of unfair economic policies in China. The Trump Administration has reportedly asked China to develop a plan to reduce the bilateral trade deficit by $100 billion. In the 116th Congress, the Fair Trade with China Enforcement Act (H.R. 704 and S. 2) and the United States Reciprocal Trade Act (H.R. 764) mention U.S. trade deficits as a reason for the proposed legislation. There is a large and growing difference between the official trade statistics released by the United States and the People's Republic of China. According to the United States, the 2018 bilateral merchandise trade deficit with China was $419.2 billion. According to China, its trade surplus with the United States was $323.3 billion—a $95.9 billion difference. This report examines the differences in the trade data from the two nations in two ways. First, it compares the trade figures using the Harmonized Commodity Description and Coding System (Harmonized System) to discern any patterns in the discrepancies between the U.S. and Chinese data. This comparison reveals that more than 94% of the difference in the value of China's exports to the United States in 2018 was attributable to five types of goods. Those five types of goods, in order of the size of the discrepancy, were electrical machinery, machinery, toys and sporting goods, optical and medical equipment, and footwear. The second approach to examining the differing trade data involves a review of the existing literature on the technical and non-technical sources of the trade data discrepancies. The literature reveals that the leading sources of the discrepancies are differences in the list value of shipments when they leave China and when they enter the United States, and differing attributions of origin and destination of Chinese exports that are transshipped through a third location (such as Hong Kong) before arriving in the United States. In light of the differences in the official bilateral merchandise trade data, the U.S.-China Joint Commission on Commerce and Trade (JCCT) established a statistical working group in 2004. The working group has released two reconciliation studies (in 2009 and 2012) to identify the causes of the statistical discrepancies. The Working Group stated that the adjustments contained in the two studies are not meant to imply errors in the official statistics of either country. This report is updated annually, after the release of official trade data by China and the United States.