Question: In 2015, how many people could have read Wings of China?

Context paragraphs:
Datsun DC-3: The Datsun DC-3 was a lightweight automobile produced by Nissan and sold under the Datsun brand in 1952.  The series was a predecessor to the Fairlady sports cars, and succeeded the pre-war Road Star.  It was powered by the 860 cc Nissan D10 straight-4 engine which produced 20 hp and could propel the DC-3 to 70 km/h .  The side badges read "DATSUN 20" (20 meaning 20PS).  Leaf springs were used in the suspension, and a 3-speed manual transmission was specified.  Four people could ride in the DC-3.  Only 50 DC-3's were ever built; of these 30 were sold (the remaining cars were converted back into trucks).  A variant of the DC-3 was the Datsun 5147 pickup.

Tapiture: Tapiture was a social discovery site and mobile app where people could find, share and buy content to share on social networks as well as products available for purchase.  The platform identified users' interests by analyzing the images, video, products and other content they interact with on Tapiture, and then recommended new content based on that behavior.  People could also add new content to Tapiture from other websites or from their phones to share with others.

Air China: Air China Limited is the flag carrier and one of the major airlines of the People's Republic of China, with its headquarters in Shunyi District, Beijing.  Air China's flight operations are based at Beijing Capital International Airport.  In 2015, the airline carried 90 million domestic and international passengers with an average load factor of 80%.

The Stone Balloon: The Stone Balloon was a restaurant in St. Croix in the U.S. Virgin Islands founded in 1960 by George Sedlmayr, a former Naval aviator and Eastern Airlines pilot from Long Island and his wife Jean Compo Sedlmayr, a former Conover model.  Located at 1 Queen's Cross Street, in Christainsted, it was a gathering place for residents and visitors alike.  Originally, just the bar area was open.  Soon afterwards, the Club Room was created.  Square black tables with poker lights overhead and captain's chairs provided the setting for chess, backgammon games or bridge games.  Occasionally, there were even pick-up-sticks games.  The ticker tape, picked up at the Merrill Lynch office at closing, hung from a clipboard on the wall.  "The New York Times" and the "Wall Street Journal", as well as other newspapers and numerous magazines, were available, as were books in a lending library.  One special area was the club table, a long low wooden table with ten chairs around it.  It was a place where people who were on their own could sit, meet other people, catch up on the news or just read the paper or a book.  The last addition was the Garden.  In the center of the courtyard of the old Danish building was a large mango tree, surrounded by banana trees, a pomegranate tree and flowering shrubs.  Set in the garden were wooden tables and captain's chairs where people could eat dinner under the stars in the balmy air of the tropical nights.

Wycliffe's Bible: Wycliffe's Bible is the name now given to a group of Bible translations into Middle English that were made under the direction of John Wycliffe.  They appeared over a period from approximately 1382 to 1395.  These Bible translations were the chief inspiration and chief cause of the Lollard movement, a pre-Reformation movement that rejected many of the distinctive teachings of the Roman Catholic Church.  In the early Middle Ages, most Western Christian people encountered the Bible only in the form of oral versions of scriptures, verses and homilies in Latin (other sources were mystery plays, usually conducted in the vernacular, and popular iconography).  Though relatively few people could read at this time, Wycliffe’s idea was to translate the Bible into the vernacular, saying "it helpeth Christian men to study the Gospel in that tongue in which they know best Christ’s sentence".

Highwater Rock: Highwater Rock is located in Cedar River near downtown Cedar Rapids, Iowa, United States.  It is a large granite boulder in the rapids in the eastern half of the river.  Its height depends on the river level.  It can be 3 ft to 4 ft above the water level in low water, or submerged in high water.  It was used to gauge the river depth from the 1840's to the close of river navigation in the mid-1860s.  In the early days people could cross the river at the rapids on horseback, on foot, or by wagon and buggy.  They woulduse the rock to determin if it was safe for them tocross.  After David W. King began ferry service in 1848 and a toll bridge was built, people would use the rock to determine if the water was low enough to cross the river and avoid paying for the tolls.  King would use the rock to determine the amount of cargo he could carry or if he could run the ferry at all.  After steam navigation was established on the river the steamer pilots would use the rock to determine if they could continue past the rapids.  Railroads severely curtailed the use of steamboats on the Cedar River, and in 1870 the United States Congress declared the river was not navigable above Columbus Junction, Iowa, which is well below Cedar Rapids.  This put an end to water transportation on this part of the river, and the usefulness of the rock.  It was listed on the National Register of Historic Places in 1977.

2002 El Ayyat railway accident: The El Ayyat train disaster happened at 02:00 on the morning of 20 February 2002 in an eleven-carriage passenger train travelling from Cairo to Luxor.  A cooking gas cylinder exploded in the fifth carriage, creating a fire which engulfed seven third-class carriages, reducing them almost to cinders.  The initial number of dead given by officials at the time was 383, all Egyptians.  However, considering that seven carriages were burnt to the ground, and each carriage was packed with at least double the maximum carrying capacity of 150, this number is considered by many people to be a great underestimate.  The dubious nature of the given death toll lies with the absence of a full passenger list; accounting for those missing was almost impossible at the time.  In addition, the fire was so intense and the carriages so badly burned that many corpses had been reduced to ash.  As there was no means of communication between the driver and the rear carriages, the driver did not know of the fire until about two hours after it had begun, resulting in many people, attempting to flee from the overcrowded carriages, jumping to their death.  Some important Egyptians have commentated that the official number of 383 dead is grossly inaccurate and was an attempt to lessen the damage done to the reputation of the government.  Many people consider a number of about 1000 deaths to be more accurate.

Wings of China: Wings of China is the inflight magazine of Air China.  The magazine is published monthly in Beijing, China.

Picture stone: A picture stone, image stone or figure stone is an ornate slab of stone, usually limestone, which was raised in Germanic Iron Age or Viking Age Scandinavia, and in the greatest number on Gotland.  More than four hundred picture stones are known today.  All of the stones were probably erected as memorial stones, but only rarely beside graves.  Some of them have been positioned where many people could see them at bridges and on roads.

Precious Blood Church fire: Precious Blood Church of Holyoke, Massachusetts burned on May 27, 1875 killing 78 people.  The fire started at the front of the church as a candle flame ignited a curtain.  There was a crush of people through the entrance at the back left and many people could not leave.  It is one of the deadliest fires in American history.

Supporting paragraphs: Wings of China Air China
Answer: 90 million