Also in October, consumable items called graffiti were added to the game. These items replaced a feature present in the previous iterations of the series called sprays. Previously, players could customize their sprays. Graffiti ideas can be uploaded to the Steam Workshop in the similar manner as gun skins and players can buy and trade the existing graffiti in game. One month later, glove skins were added. In September 2017, Valve Company worked with the publisher Perfect World to release Global Offensive in mainland China. Chinese citizens, with their identification verified, can receive the game for free and earn Prime matchmaking status immediately. The game is played through Perfect World's launcher and contains numerous exclusive changes to the game, including the censorship of skulls and other symbols. Some other changes were in the cosmetics in certain maps, for example, the hammer and sickle on Cache and Train were removed. In preparation for the release, multiple cities in China celebrated and heavily promoted its upcoming release. Users who played the game during its launch month received free promotional cosmetics. In compliance with Chinese law, Valve also had to disclose its loot box gambling odds. In November 2017, an update to the competitive matchmaking was announced. Called the "Trust Factor", it meant a player's "Trust Factor" would be calculated through both in-game and Steam-wide actions. Factors such as playtime on Global Offensive, times a user has been reported for cheating, playtime on other Steam games, and other behaviors hidden by Valve are taken into consideration when a user's "Trust Factor" is developed. This was done in an attempt to let the community bond back together in matchmaking, as Prime matchmaking separated Prime and non-Prime players from each other. Valve will not let users view their "Trust Factor" or reveal all of the factors deciding one's "Trust". In August 2018, an offline version of the game was released that allows the players to play offline with bots. An update released on December 6, 2018, made the game fully free to play. Users who had purchased the game prior to this update were automatically updated to "Prime" status and given modes that can drop cosmetic items. In addition, the new version introduced a battle royale mode called "Danger Zone". In November 2019, Operation Shattered Web was released. It operated similarly to the previous operations and introduced new character models and a battle pass system.