Aspects of the disclosure provide a method of congestion control. The tetraphenylbacteriochlorin derivative or its salt has a large molar extinction coefficient at long wavelengths which are expected to have a high tissue-penetrating property, and exhibits high selectivity to tumor cells and hydrophilicity. Also provided are methods for fabricating such semiconductor packages. The first apparatus has a resolution corresponding to that of the pixels of the light emitting part. , those of purchase orders and delivery notes, and if desired routed to the appropriate people within the buyer’s company, andor posted into the ERP system of the latter by the system. In one embodiment, an imaging system based on a Cassegrain or Schmidt-Cassegrain objective, with coaxial primary and secondary mirrors, is provided with a microdisplacement mechanism acting on the secondary mirror to displace the image on a focusing array.