TVB will film series every year, but not every series will be aired in Hong Kong. One of the biggest reasons why a series would be warehoused is that there are no sponsors for the series. Another reason is that TVB has purchased a series from either Mainland, Taiwan, Japan, or Korea to be aired on TVB Jade, so TVB would need to warehouse a series (with the same number of episodes) to accommodate for the purchased one.
Here are the different levels of 'Warehoused' series, starting with the worst case scenario.
- Released overseas and aired on Pay Vision with no promotional activities. Example: "Riches and Stitches".
- Released overseas and aired on Pay Vision with promotional activities. Example: "Face to Fate" and "Heavenly In-laws".
- Released overseas first, then aired on TVB Jade with promotional activities. Example: "Greed Mask" and "Sweetness in the Salt".
Special Case Scenario - "Ten Brothers"
- Released overseas first, and then released on Pay Vision (2006) with promotional activities. Later, it was aired (02/12/07) on TVB Jade with promotional activities. In the same year (08/20/07), it was re-aired on Jade. "Ten Brothers" holds the record for the shortest time frame between the first time it aired and when it was re-aired.